Rasp after installing an aftermarket y-pipe
#1
Rasp after installing an aftermarket y-pipe
Hello, 2 days ago I installed an after marker y-pipe (1320 y-pipe) on my 2011 g37x sedan. And it sounds like *** from underneath....
sounds like a leak or rasp but it’s only coming from underneath and not so much from the exhaust tips. Has anybody experienced anything like this?
Im guessing it’s because the outlet diameter of the y pipe which is 3inch and the inlet of the resonators piping is around 2inches, but I could be wrong. What should I do to get rid of the raspy sound?
btw my exhaust set up so far is: 1320 resonated test pipes, 1320 y pipe, and a hks axle back.
Thank you!
sounds like a leak or rasp but it’s only coming from underneath and not so much from the exhaust tips. Has anybody experienced anything like this?
Im guessing it’s because the outlet diameter of the y pipe which is 3inch and the inlet of the resonators piping is around 2inches, but I could be wrong. What should I do to get rid of the raspy sound?
btw my exhaust set up so far is: 1320 resonated test pipes, 1320 y pipe, and a hks axle back.
Thank you!
#5
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#7
Super Moderator
iTrader: (2)
It's the OEM mid pipe. The drastic change in pipe diameter is what's causing it. Either have a shop fab you up a similarly sized mid pipe or you can go the resonator route. I ran into the same issue after installing test pipes. Even with the Top Speed Y- back, the 3'' outlet to the 2.35 inlet of the Y-pipe sounded horrific.As I had already 'upgraded' the mid pipe I went the resonator route.
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#8
It's the OEM mid pipe. The drastic change in pipe diameter is what's causing it. Either have a shop fab you up a similarly sized mid pipe or you can go the resonator route. I ran into the same issue after installing test pipes. Even with the Top Speed Y- back, the 3'' outlet to the 2.35 inlet of the Y-pipe sounded horrific.As I had already 'upgraded' the mid pipe I went the resonator route.
#9
Registered Member
iTrader: (3)
It's the OEM mid pipe. The drastic change in pipe diameter is what's causing it. Either have a shop fab you up a similarly sized mid pipe or you can go the resonator route. I ran into the same issue after installing test pipes. Even with the Top Speed Y- back, the 3'' outlet to the 2.35 inlet of the Y-pipe sounded horrific.As I had already 'upgraded' the mid pipe I went the resonator route.
#10
Super Moderator
iTrader: (2)
Install your choice of Vibrant resonator. You want to have the shop install them as close to the motor as possible. They should be installed on the Y-pipe either at the flex section after the cats or you can squeeze them right after the flex section if they are short enough. I went with the Ultra Quiet set-up. Might not be for you if you like your car loud.
My car is pretty mellowed out since installing them but I can post a video and pics of where mine are located if you'd like.
My car is pretty mellowed out since installing them but I can post a video and pics of where mine are located if you'd like.
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Elbron37 (07-22-2019)
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