The Honda S2000 even comes with one from the factory! Apr 1, 2015 · Philadelphia. Feb 26, 2016 · While our most popular mufflers are generally our more aggressive ones, we usually recommend a less aggressive muffler if interior noise or drone is a concern. Dec 9, 2008 · KATOOM. Feb 27, 2007 · The theory is to reintroduce a sound wave into the exhaust that is 180° out of phase with the drone frequency. You don't really see them much in EB's, but most high-flow custom exhaust systems will add a resonator to help cut down on drone without impacting flow. 5" cancels out sound waves from 95-105 hz, but at 3" it would cancel out 90-110 hz. The purpose of the sound tube is to let engine noise flow into the cabin interrupted, giving the car a We all know we sacrifice when we add an aftermarket exhaust system to our vehicle and the biggest issue is cabin done noise but that doesn't have to be a pro Jan 19, 2021 · An often overlooked component in the fight against drone is the catalytic converter. Window Tint, 255/45/20 Michelin Pilot Super Sports all 4, Oil Catch Can, Front and Rear Camera with Lock-pick V. UUC/Corsa claim the section 2 eliminates the rasp but it was still too much for my taste. Also reading that resonated exhaust tips cut down on drone and rasp as well. Jun 27, 2007 · Dark Mode; Light Mode; menu I couldn't find any videos truly explaining how this works, so I made a detailed video explaining how to calculate the perfect J Pipe to reduce your exhaust Jan 2, 2020 · Little video I made trialling some cheap J pipes (or helmholtz resonator) I bought for my L98 VE SSV Ute. These should correlate to RPMs at which drone is most noticeable. I never would have thought somebody would wrap any part of a exhaust system in lead. No matter how you slice it, you're going to have to replace the Flowmaster 40 for either a quieter Flowmaster, or some other muffler that's quieter and doesn't drone as much. Nov 2, 2022 · The new exhaust system will fit Chevy Silverado Crew Cab / Short Box models equipped with a V8 engine. One of the nicest sounding exhausts I ever heard was a dual 2. I hated it. For the uninitiated, MagnaFlow’s No Drone Technology (NDT) uses passive quarter Nov 3, 2014 · Eliminating Exhaust Drone to quiet exhaust. Exhaust drone eliminator- magnaflow 11216. The best part of the car was it was such a sleeper. #3 · Jun 1, 2011. Apr 30, 2012 · Simply put, it's: 1100 feet per second (the speed of sound) divided by the drone frequency. You can basically force it off by going outside of the 4 cylinder activation range - meaning ~ 3. Helmholtz resonators and J-Pipes can reduce exhaust drone by eliminating or reducing the offending frequencies. I also have a M>W switch that allows me to become Mild when needed. The resonator tube needs to be exactly one-fourth the length of the full resonant wave. Had to keep the speed above 80mph to keep the DRONE to a minimum. Changes range from adding mufflers or sound dampeners to more involved changes including exhaust system modifications. Jun 10, 2017 · Exhaust noise / drone. 7 Hemi exhaust music. . Doing this may lower exhaust drone in the cabin, but it can be very labor intensive. I was just looking for just a bit more rumble so to speak. The best way to fix the problem is to replace your existing exhaust system with a high-quality aftermarket system that uses True Helmholtz Technology to eliminate the drone. Say you have a single 3" exhaust, and that 25" tube @ 2. 25 Inch Pipes, Steeda G-Trac Bar, Ford Factory Strut Tower Brace, MM Aluminum Steering Rack Bushings, Steeda Rear Adjustable Sway Bar, and Steeda Tri-Ax Short Throw Shifter w/Hurst Shifter Handle, GT500 Style Black Hood Pins, MACH 1 Style Chin Spoiler, RedLine Tuning Hood Struts Sep 18, 2014 · If you have the 392 6. The drone is almost non existent compared to my 2017 with the mufflex. I have noticed that most systems in the posts are 2 1/2 inch. I have heard that the Corsa cross pipe reduces to almost nil any drone. Aug 16, 2023 · Summary List. 95. Helmholtz resonator isn't new, but it works. take the result from #5 and divide by 4. The rest will remain flat-black like it is now. MDS equals horrible exhaust note as you are losing 4 cylinders but that’s not drone. 7 VVT/Etorque. Eliminator design Each exhaust system is produced from high-grade 304 stainless steel with Jan 26, 2015 · Cutting up the stock exhaust, from removing mids to removing resonators and keeping mids with Blastin' Bob pipes, cats, no cats, high flow cats, to Magnaflow Competition exhaust all had varying degrees of drone. How I removed the drone sound from your deleted muffler. [sigpic]29033 [/sigpic] Jun 28, 2007 · Product Reviews. It based on the more like sound waves and frequency. The more air an engine releases the more you need to control the tone/pulse at a comfortable level. Go get some ceramic wool. Corsa and Solo Performance have been our go to systems when it comes to drone free exhaust systems. 24. . Charles, IL. Drove back and forth from Tampa to Orlando today and the DRONE got a little annoying. Drone is not caused by MDS. I know, I know! You guys are probably getting sick of seeing exhaust builds on the GMT800 Stepside build, but this cammed 4. For note, my drone was between 1900 and about 2300 rpms. As air moves past the resonator, air is pulled in and pushed out, changing the pressure and thus the sound. Drives: 2022 Rapid Blue SS 1LE. To deal with the 57 Hz drone, the chamber would have to be 58. Jun 4, 2020 · Location: St. Learn Why Here. 2, the trunk space (as well as the dual layer trunk lid) are acting as an acoustical chamber that amplifiers the exhaust noise. Thread starter mudbilly; 1972 Mach 1 Q code 2007 GT 1969 Cougar Eliminator B302 CSX 7000 Shelby Cobra FIA 2020 Edge ST May 3, 2015 · The resonator is there to balance the tone/pulse of the exhaust. I know this isn't my installation because the guy I bought it from had the same issue (I could see Jun 14, 2021 · This is my longest video yet, and also my longest to make. It was clean and quiet. Posts: 732. What this is, Is a small weight swedged into a bracket and welded to the factory pipe on a 2014 Dodge Ram pickup truck. Solo is a nice affordable alternative with more of a muscle car sound. This Flowmaster Force (FF) II system in comprised of two series 44 flowmaster mufflers and a pair of flowmaster resonators and each exhaust tip. pretty easy after you fight to get the OEM system off, but it sounds amazing. take the result from #6 and multiply by 12 to get the resonator length in inches needed to cancel the Jan 30, 2008 · Product shown is single input O-Pipe with polished finish. The Borla system uses a muffler only, without a resonator at the rear of the car. Oct 27, 2017 · 1. Well, in my Mustang, the drone was so bad, it was driving me nuts. 5 ) minus muffler, so fairly loud on the highway. It does not take away any horsepower and retains the tailpipe sound. Applying the sound-deadening panels in a small car can increase its weight by up to 80lbs. 7" to cancel out the 115 Hz freq (that's what I used). They work by taking the sound pulse and reflecting it back into the exhaust pipe 180 deg out of phase May 4, 2010 · I too have a RT 6spd. FREE Shipping Market Price $755. Other than the rasp problem I much prefer the sound without cats. com/drone. 3521 posts · Joined 2007. #5 · Oct 12, 2010. Unless you're running forced induction or have a built motor you probably have minimal performance gains anyway. Best Factory Jun 22, 2014 · The bottom is parallel with the top to force the sound directly to the rear and eliminate the echo under the car. Multiply the quarter wavelength number by 12 to give the required chamber length. Save Share Jun 1, 2011 · OmahaRumble. Overall Length: 24". I'm planning a 3000 mile trip in a month and want to quiet this thing Jul 28, 2015 · Engine. This changes the exhaust note. Just the deepest best sound you ever heard. the number is funky because sound travels faster in warm air, and the air coming from an exhaust is very hot. It had stock mufflers and a resonator delete when I bought it. Jun 5, 2019 · 422. Please leave constructive comments and click "li Feb 7, 2021 · 151 posts · Joined 2017. On the aforementioned Magnaflow Competition exhaust I wound up welding in 2 additional bullet resonators that got rid of 90% of the drone. Attach J-Pipe at 90° to exhaust pipe. This is a factory setup. 54) Up to 10% off for Military & First Responders! Nov 13, 2021 · You're running single pipe, which gives you an advantage over any other trucks running duals with the same issue: you don't have to run a crossover or y-pipe to reduce the individual exhaust bank pulses. #6. $89. divide the speed of sound by the Hz. Jun 8, 2011 · Exhaust without Drone. Now that I proved it works, I'm going to weld on a 1/4" stainless rod around the edge of the outlet and radius the corners to take off the edginess. 8 LR4 is kinda annoying do drive Apr 15, 2014 · 5. 7 hemi) droned the most at 1500 rpm. Corsa is king but you pay a premium. I still have a slight drone at highway speeds when in the Mild mode. Best Universal Fit: Vibrant 1792 Bottle Style Resonator. The Drone Suppression Pipe is designed to work with all dual and single exhaust systems for the Dodge Ram 1500 Years 2009 to current. 3 my truck is stock exhaust (3. Oct 25, 2010 · Re: Exhaust drone resonator fix - First resonator This is a great project. Apr 25, 2024 · Go get some ceramic wool. I have ordered 2"x24" NoDrone helmholtz resonators to install before my mufflers on the 'Cuda. My local exhaust shop has offered to build a 3" exhaust for $7-800. The new 5. This review may seem short, but thats because the Magnaflow exhaust is garbage. 93" long, or TWICE as long as the 115 Hz chamber length. This “J” pipe separates a sound wave that usually goes into the muffler and traps it in a chamber, causing it to dramatically reduce cabin Oct 5, 2008 · Corsa Exhaust DRONE!!! I had my Corsa Exhaust installed a couple of days ago. I've heard of guys clamping a piece of 3'-4' L stock to exhaust pipe and the added metal changed the vibration of the pipe thus reducing or eliminating the drone. J pipes as you say, are called resonator pipes. Jun 27, 2021 · laser-red-nova said: Out the back and flowmaster 40's. Bumped up to 30" and it killed the drone at highway speeds but needed to be a little longer to capture the drone at 1800rpm. Feb 21, 2023 · Exhaust drone can be a frustrating and annoying sound that can detract from your driving experience. The only exhaust I've read about that has ZERO drone is Corsa. They're the longest I think I can fit back there. From my understanding smaller tubing than the exhaust will work but the same diameter tubing will work the best. Just intsalled the MBRP dual exit caback exhaust. Didn't notice too much DRONE driving around in the city but noticed ALOT of DRONE on the highway today. MagnaFlow xMOD Series Universal Performance Muffler NDT2. Both will bolt up to your Kooks headers. Like. Helmholtz chamber length would need to be 28. But I saw several people on this forum mentioning that a stock system with muffler delete, and keeping the resonators near the tips in place, is the best combination for maintaining no drone while adding a good growl. 16. This may sound a bit harsh, but Screw the Dynamat and all it's derivatives, get another Resonantor thrown in that will help kill the drone. The idea of using Helmholtz resonators to eliminate drone is certainly not new and a web search will find some nice information and experiences from Corvette and Mustang owners. 3L Ford Powerstroke. 5" Outlet. Nov 23, 2019 · BLUPRINT_1LE. Divide this result by 4 to give a quarter wavelength. $592. at WOT its actually a little louder than i wanted but has a deep rich tone. I just purchased an 11 RT. I believe the drone is not determined if you have Npp or Non-Npp. Typically 2000 rpm is the number one area where the drone occurs, especially under load (Ie going up a hill in a high gear) When I switched to 3" exhaust the HP went up substantially, but noise was deafening in the car. I've been doing some research into side branch or 1/4 wave resonators - closed "J" shaped pipe of SPECIFIC length added to the system. Magnaflow Street Series Axle-Back Exhaust System with Polished Tips (07-18 Jeep Wrangler JK) Magnaflow Street Series Axle-Back Exhaust System with Polished Tips. I have drone on my exhaust, but I don't mind it. Posts: 18,663. It is often caused by the resonance of sound waves bouncing around inside the exhaust system and entering the cabin of your vehicle. Sep 20, 2009 · For example if, in 8-cylinder operation the drone freq was 115 Hz, in 4-cylinder operation it would be HALF that, or about 57 Hz. Apr 1, 2015. Jul 7, 2014 · Pulled away from the first stop sigh and as the engine went through the 1750 to 1900 rpm area and past it there was absolutely no drone, just sweet beautiful 5. Feb 3, 2014 · Danner. 54 You Save 13% ($98. 1, we are trying to find out if the drone is originally generated from the engine firing order or the resonance of the exhaust pipe. Jan 20, 2023 · I did a Magnaflow cat-back exhaust system then later deleted the muffler. Forum Jump. It works, but with the cutout closed, now Jan 12, 2018 · 1999 - 2003 7. GM realized they can't just rely on the muffler to balance the exhaust tone/pulse in an engine that pushes 355 horsepower. Blocking exhaust holes and wrapping in lead is way way out there to kill a droning sound 99% of riders will never hear on the second quietest motorcycle ever produced. Feb 22, 2021. Not only does a converter help clean up the exhaust gases, but they can dampen down the noise as well. After running 20k miles on the AWE touring exhaust, finally fixed the drone issue it creates. 73 gears, it droned at about 60 mph. Jun 12, 2022 · If you have ever modified your vehicles exhaust, chances are you will have an issue with cabin drone. Hemi 5. Most sport cars have a sound tube between the engine and the cabin. 5. However, there is a little drone none the less. Comes in many thickness and good to 2300 F. True Helmholtz Technology changes the exhaust pressure to eliminate droning and still provide a rich, full exhaust sound. It will have the biggest range. Join Date: May 2017. The difference between a two-chamber (left) and a three-chamber muffler (right) cannot be appreciated until you open them up. the speed of sound is a constant 1,260 ft/s. It’s not compatible with 2WD Crew Cab models with 2-piece driveshaft. Oct 12, 2010 · Crawdaddy. Edit : each exhaust will make its own drone depending on piping and mufflers so i must figure out the length of my j pipe depending on the frequency where my whole exhaust is resonating E90 328i n52 auto, 3 stage IM, k&n drop in, charcoal delete, silicone boot, ebay headers, secondary cats delete, bpc tune. Sound-deadening materials that effectively muffle exhaust drone are expensive and heavy. Aftermarket exhausts will amplify the sound more than OEM, and create that drone. Select the department you want to search in Jul 13, 2023 · July 13, 2023 | Team MagnaFlow. This finds a more accurate SoS value for the drone calculation based on exhaust temperature. 31 gears, it moved up to around 75 mph. While the remaining exhaust note is richened and deepened, undesirable noises (like exhaust drone) get canceled out. They need to exit the main exhaust pipe at a 90 deg angle and for the freq most of use are hearing they need to be about 24 inches long. You need to fix the source of the noise. – Lethal Performance Current Sales & Promotions – FAQ: Fuel System & Fuel System Components – UPR Products for your Ford F150 | Catch cans & more! – UPR Products for your Explorer ST – Why you should choose FIC Fuel Injectors for your build – FIC Fuel Injectors for your F150 – New & Exclusive: Lethal Performance by May 4, 2019 · They can kind of cancel each other out, depending on how radical your cam. Jump to Latest Follow Jun 1, 2015 · Drone is the sound that pounds your head at certain freq. Frankly the sound from the factory exhaust is "sissy" at best as I am sure many of you know. But yes u r right the cats being gone is the main reason for my problem. you can delete the drone br adding resenators or by using a j pipe. It’s due to the exhaust configuration and resonance of the system as well as location of the resonance in relation to the body of the vehicle which will amplify sound waves. It was bad enough that after 15-20 minutes, I wanted out, even worse with the windows up. 1401 posts · Joined 2013. Drone is caused by certain frequencies so it's never going to go away, and to reduce it enough you're going to need a shitload of dynamat or other sound deadening material and it's going to add a lot of weight. An Oversized, Generic Silencer Is A One-Size-Fits-All Solution That Won’t Really Solve Your Drone Issues. 7060 Views 13 Replies 8 Participants Last post by MRTaylor17, Apr 13, 2015 Jump to Latest 1. Same set up as before the drone. a drone is a awful humming sound that is usally around 133Hz and it usally goes along with loud exhaust systems such as flowmasters and magnaflows. Exhaust Drone is the vibrating sound that occurs in vehicles most often at steady highway speeds and is caused by the engine and exhaust system vibrating at incompatible frequencies. Plug the Sound Tube. 7 autos. Basically that means cruising in 5th and 6th rather than 7th - and say good bye to ever seeing more than 20mpgbut uh you'll be in 8 cyl mode. Mar 7, 2013 · Mar 8, 2013. For me, my 2020 Ram 1500 (with a 5. When I had 3. In today’s Tech Talk, Richard Waitas chats with local hot rod building legend and MagnaFlow Ambassador Jimmy Shine about the background of No Drone Technology such as that found in our xMOD Universal Mufflers (#14006 / #14009 ). 7. May 22, 2024 · How a Helmholtz Resonator Works in an Exhaust. 10 gears 200K miles. #29 · Sep 18, 2015. 4867 posts · Joined 2011. The drone while cruising at 2k rpm bothered me a lot more than before even though we drive less now. The exhaust has brain melting drone from 2500rpm to 3800rpm. So I don't want to change anything. But, I do not want the drone either. Jump to Latest Follow Follow Jul 2, 2017 · 53. It is called a J-Pipe, an added pipe configured to take out that specific tone on a specific RPM ran Dec 2, 2023 · I’ve created some exhaust calculators on StrikeEngine, specifically a Helmholtz calculator and a J-Pipe calculator. Fortunately, there are several methods you can use to eliminate or reduce exhaust drone and enjoy a quieter ride. The number one sign of Kuhneutson failure is reduced bore on your engine block! May 16, 2017 · Problem: engine drone 3500-4000, it is quite bad through that zone, so lets say 3750 rpm + or - 250 rpm. The sound is good, with very little drone. Disturbing the vibration changes the harmonic pitch. Jun 4, 2021 · So how does making the pipe a 1/4 wavelength cancel you exhaust drone? View attachment 491954 When the exhaust gases from your main chamber enter this J Pipe, they travel a distance of 1/4 wavelength into the pipe, and 1/4 wavelength back into the main chamber. Jan 3, 2015 · 1980-'96 Bronco Tech. C6 Corvette ZR1 & Z06 - Exhaust Drone Elimination. Location: Motor City -> AZ. It branches off the exhaust tubing. 5k rpm+. It's pretty normal. 7 Mopar system has larger mufflers replacing the suitcase resonator, and straight pipes to the tips. We've put a couple Mopar Cat Backs on the 5. Nov 5, 2008 · 04 GT 40th Anniversary - BBK CAI, BBK Off Road X Pipe, Steeda MIL plugs, Flowmaster Mufflers w/2. Watch Video. Apr 12, 2021. 4 with and auto it will drone with SOLO exhaust. This is what the 1/4 wave resonator tube accomplishes. Next would be 500-700 rpm (idle. Going to try a 31 & 32" total length coming up. Like DocDyno stated, the drone is a vibration in the exhaust. But I'm not buying a new catted y-pipe. Aug 18, 2021 · Summary of Exhaust Drone. Attach J-Pipe in front of muffler, but behind catalytic converter. 5" Inlet / 2. Feb 5, 2021 · 48. J Pipe will usually look like this, Apr 26, 2024 · 198 Posts. (Try and get a temperature reading near where the drone pipe will be installed for accurate calculations) Temperature in F. - I have B&B Fusions with a stock cross pipe. I have a 16 GT with Roush supercharger. I just dialed in my Sniper EFI to work super. I've read a few people with Solo that have drone. Jan 6, 2016 · It is fairly permanent and requires care and effort in applying—make sure your Mustang's inner body is clean and mask all areas you want free of sound deadening before spraying it, then visit a Jun 22, 2011 · 2 posts · Joined 2015. I've spent the past 5 months refining the exhaust on my Passat CC to get the perfect sound, and I December 2013. Watch the video summary here. In addition to the links in the StrikeEngine article Feb 4, 2021 · Links & Calculations Below: How to reduce exhaust drone noise after install of a performance exhaust system. #1. Without it you will get a horrible drone. This is why they tend to drone in the 2000 to 2300 RPM range. These chambers are pipes cut and welded into the tailpipes and capped off on the other end, creating a closed "echo Dec 30, 2017 · The 26" total length was too short and amplified the drone from 1600-2000rpm. HoleShot Series™ Cat-Back Performance Exhaust System Independent Resonator Body to Eliminate Drone and Boom Inside the Cabin Turbo-Chambered Muffler Dyno-Tuned for Increase in Torque and To Produce a Deep Exhilarating Tone from Mild Tip-In Throttle to Aggressive Full Throttle Acceleration Sound Level Enjoyable for Long Road Trips or Even When Pulling a Trailer Complete Cat-Back System to SKU #: DE-K4319S-TD-2-main Diamond Eye 4" Stainless Steel Turbo Back Single Turn Down Exhaust Kit 00-03 7. 5 into 3 inch single exhaust exiting out behind the passenger rear tire of a gmt400. #15. Update I decided not to remove the "H" pipe after all. SHOP NOW. Apr 4, 2022 · I'm running fabspeed headers, CPI Section 1 Rasp Eliminator with Crossover (RTX) and UUC Corsa Sport Exhaust (Section 2 and 3). #2 · Feb 3, 2014. Adding the CPI section 1 has eliminated it and I have zero drone. The Flowmaster American Thunder Cat-Back Exhaust with split side or rear exits is designed to fit 2014 to 2018 5. My goal was just a little more sound at idle and under acceleration. Best Value: DC Sports EX-1013 Resonated Muffler. If you have any questions, feel free to shoot me a PM or give us a call at 707-544-4761. Mar 8, 2021 · To calculate what length your j pipe needs to be, you have to decide what RPM the drone is the worst. For a total distance traveled of 1/2 wavelength, or 180 degrees. Usually, it manifests at a certain RPM and can be mind- Check out how to reduce a set of low frequency exhaust sound frequencies people call "drone" in this video. Apr 6, 2016 · So 25". Switch to 34" and it only reduced the noise way down in the rpm range. Jul 15, 2018 · My Classifieds: 0. Diamond Eye 4" Stainless Steel Turbo Back Single Turn Down Exhaust Kit 00-03 7. Apr 1, 2015 · Exhaust Tech Magnaflow drone / J pipes Magnaflow drone / J pipes. Nov 19, 2009 · 1 / 2. Your car sheet metal isn't doing the resonanting, it's the exaust. It doesn't fit and rubs the rear valance (wearing thru the paint in days). Exhaust resonator tube to kill drone. The EFI wont change exhaust drone. The solution is to shift to a higher gear, letting the engine cruise around 1500-1700 RPM. and want a beefer sound. Jul 6, 2017 · The reason we did this is because. 3L Power Stroke Diesel - Exhaust drone elimination project - Hey all, looking to see if anyone has tried to tackle removing exhaust drone on their 7. (07-18 Jeep Wrangler JK) Verify parts fit and get product recommendations. The sound wave enters the resonator tube, bounces off the capped end and re-enters the Aug 25, 2015 · They had some slight interior drone but no rasp. 1991 Chevy Suburban 1/2 ton 2WD w/ chevy SBC 350-3/4 ton drivetrain upgrade w/4. ) The drone will occur at double the revs both ways, so this is true for 3000 rpm and 750 rpm as well. Dec 17, 2017 · 1999 - 2003 7. Best Overall: Vibrant Performance 1794 Bottle Style Resonator. 6. Have a good look at the pictures. The conclusion is they muffle the exhaust note more Feb 7, 2022 · Corresponding J-Pipe Length to Cancel Drone (frequency) Use Spectroid app (or other sound analyzer) to help verify drone frequencies. (AKA "Kneutson, Kanutson") Our superior Kuneutson valves are superior to the inferior kuhneutson valves! For use especially on engines with camshafts. They were mentioned above as bullet mufflers or glass packs and can really be added anywhere you have clearance. Just a quick update. That's why we use it on all of our exhaust systems. You run a pipe parallel to you exhaust with one end connected Jan 14, 2015 · Strange Fix For Exhaust Drone. Read the full article here. Speed of Sound Value. #1 · Feb 7, 2021. I also ordered two vacuum-actuated 2" exhaust cutouts that'll put at the end of the resonator, instead of the welded cap. We removed the stock pipe between the Y pipe and the muffler to install an exhaust cutout. at 2000-2500 RPMs, you will hear the exhaust much louder than at other times. 3L Chevy Silverado 1500 models equipped with Double or Crew Cabs. A daily driver can become uncomfortable with ex May 26, 2021 · http://super-null. When I went to 3. That’s bad for performance and fuel economy. It allows soundwave to travel inside and bounce back, destructively interfering with the exhaust soundwave, thus canceling the power in the signal at the specific frequency. Jul 1, 2004 · Quote, originally posted by Non_Affiliated ». It definitely has drone. htmlUse the exhaust tool above to determine what pipe length you need to use for your exhaust! Keep in mind how many pulses per r An Oversized, Generic Silencer Is A One-Size-Fits-All Solution That Won’t Really Solve Your Drone Issues. Award. J-Pipe is a "J" shaped pipe, with one end connected to the main exhaust system, and another end closed off. Drone is resonance from the exhaust aka from either mufflers, your new Hpipe etc etc. #37 ·Apr 30, 2024. zy bv yi zc dt df wq gv xa jh