Vibrant PerformanceVibrant Performance 1142 3" Ultra Quiet Resonator

A little background first. I have a 2009 Chevrolet Silverado 1500 Crew Cab 4wd with the 5.3L LC9 engine. Unfortunately, I lost a couple lifters/cam lobes due to some oil issues at around 125k miles. Since those valve train parts had to be replaced, I decided to upgrade instead of keeping stock parts. After all the work was done, I had a mild towing cam, deleted the AFM/DOD system (V4 mode), installed new lifters/push rods/springs/trunnions, installed a new higher-pressure oil pump, a K&N cold air intake, and then upgraded the exhaust from the motor all the way back. All these modifications were tied together with a custom dyno tune.The new exhaust system that was installed included Kooks long tube headers with 1-3/4" primaries & Kooks catted y-pipe. Behind the y-pipe I replaced the factory/stock cat-back with a Corsa dB, part # 24904. I opted for the dB system because it was about $400 cheaper than the normal Corsa Sport system (part # 14904), and it connected right up to the Kooks y-pipe (easy install). Everything I read about the Corsa dB system was that it was definitely louder than stock, but had very little if any drone. After installing the system and spending about a month driving around, it indeed had very little drone, but unfortunately it was just too loud for me. It definitely sounded mean, but as a daily driver it was just too much. As such, I started searching for a solution that would quiet the exhaust down a little without taking away too much performance.The Vibrant Ultra Quiet Resonator was a perfect solution and far exceeded my expectations! From cold starts to highway speeds, this little resonator made a major difference and took the edge off of the loudness. Also, so far, I haven't noticed ANY difference in performance, either! This makes sense, because the resonator is a straight-through design and probably has negligible impacts on free-flow. However, I didn't dyno before and after, so I can't necessarily guarantee that it didn't affect performance.....there's your disclaimer for those who are more educated on this subject...How I installed my resonator (see pictures): Since the resonator is 9.75" long (not including the pipe connection ends), I cut a 9.75" section out from my current exhaust setup, so that it would fit perfectly once the pipe ends of the resonator slid on to either end of my existing exhaust. The Kooks y-pipe and Corsa cat-back connected to each other via a spherical clamp setup. Both the Kooks y-pipe and Corsa cat-back were designed to connect to the stock systems (front or back). So, whether you were installing the Kooks headers/y-pipe and keeping the factory/stock cat-back, or putting the Corsa cat-back behind the factory/stock y-pipe, it would fit because they both necked down to a 2.75" (stock) inner diameter connection. So, if you can visualize this from front to back (see pictures), the Kooks y-pipe end necked down to a 2.75" i.d. and ended with a male spherical clamp connection. The Corsa cat-back started with a female spherical clamp connection, then 2.75" i.d., then necked out to a 3" i.d. Since the inner diameter of the resonator is 2.75" (if you measure the inside of the actual resonator portion), I figured by eliminating the 2.75" i.d. spherical clamp section and replacing it with a 2.75" i.d. resonator, it wouldn't make much of a difference in the system flow, because with both configurations, that section of the exhaust would still be 2.75" i.d. (If that was super confusing, just check out the pictures and it mostly explains it visually)I know this review was long and included a lot of details that may not have anything to do with the resonator. However, I wanted to provide details because when it comes to exhaust, the cam of the motor, the headers, the y-pipe (with or without cats), and the cat-back system can all play a role in how the exhaust sounds. For those out there who have a similar truck with the same engine and similar mods, this may be exactly what you're looking for to quiet down the exhaust. For those out there who are just trying to see whether or not this resonator works....it definitely does!!With the resonator now installed, under light-duty driving conditions, it is very similar to the quieter, stock exhaust note. However, when you put your foot down, you can definitely hear that aftermarket/higher performance sound. It's quiet when you want it to be quiet, but not too quiet for when you want let 'er rip.

I bought this for my mr2 that had a v6 swapped into it a few years back. Being mid-engine, from the headers, to the y pipe, back to the muffler (flowmaster 80 series) is probably no longer than 6ft. I went with the 80 series because it still has some baffling and with nothing else to muffle the noise, it kept it bearable. But there was still pretty good drone at certain RPMs and it gets really raspy at higher RPMs.After reading a bunch of reviews, this made sense, and more importantly fit in a section of my exhaust. After installing it, the raspiness pretty much went away and there are more RPM ranges where there is no drone. Overall when it does drone, it's probably 20-30% quieter across the power band.If you have a louder exhaust, I would definitely recommend this thing. It's straight through so there should basically be no power loss and it does a good job of cleaning up raspiness and droning.

I have a g37 coupe and I have single exit exhaust and I had a lot of rasp and drone specifically Low RPM so I got a Ultra Quite Resonator and placed after Y-Pipe on my mid pipe. Now the car sound great no rasp even low RPM it’s a very good quality resonator that u can’t go wrong with it on idle it’s quite but on WOT it open up and sound great. I totally love my new set up with this resonator so I’m pretty happy

I actually purchased a $200 cat back exhaust and some pretty inexpensive high flow cats and the combination was crazy loud. Sounds awesome but the drone was rough and my neighbors weren’t quite as excited. Did a little cutting and installed this after the muffler and it sounds amazing! No more drone and the overall sound is considerably quieter. Very happy with this purchase.

This thing is sharp looking. Still nice and shiny after 3k miles. Installed in 3" pipe on Ram 1500 Hemi to knock the loud sound down a bit and try to remove some drone after I replaced the stock muffler with a free flowing unit. Surprisingly, the 3" factory Ram pipe fit inside the 3" pipes on the resonator so was able to just inserted it 2" on each side and put a clamp on it and it was very solid. Definitely brought the new muffler sound down a few dbs so the neighbors hate me less in the AM. Didn't really do anything for the drone. Not the miracle worker some claim it to be for drone, so I may look to change my muffler out so something a little quieter.