sterling99SEL

I installed a used Cattman y-pipe today I bought off an org member. Most posts I read on here said the y-pipe shouldn't make the car any louder than stock. But mine is alot louder now, at idle, WOT, everything. Sounds kind of like a '92 300ZX for example but louder. I'm wondering if either I need to try to tighten the bolts up or if there could be a problem with the flex. Anyone heard of a problem like this?

Also, I just used the same gaskets at the manifolds that were already on the y-pipe and used my factory gasket at the cat. Is this acceptable?

97maxinMA

Hey man stick a board or something in the exhaust outlet , this will create back pressure, and listen for any whistling comming out of the exhaust... if you hear alot tighten down on the bolts where you here it ( you shouldn't be able to miss the whine, it sounds like a high pitched whistle. if you dont hear any whistle you probably don't have an exhaust leak... you might hear a little noise comming out that is natural but alot isn't so check it out and tighten down the bolts.
good luck

Tifosi

iTrader: (1)

Do what 97maxinMA said, and listen closely to the flex section, make sure that section isn't blown. My friend's flex section blown and it doesn't sound too good.

Tifosi

turbomax97

iTrader: (6)

if it's really that loud, check the gaskets.

KiLLeR2002se

iTrader: (4)

i just installed my cattman a few days ago.....**** is kinda loud. I checked for leaks and did'nt seem to find one. I guess cause i got a cat-back with no resonaor thats bound to happen. Did u keep your resonator? If not, thats where the extra noise is probably coming from.

sterling99SEL

I still have the resonator. Everything is stock but the y-pipe. I need to do that test to check for leaks I guess.

turbomax97

iTrader: (6)

if everything else is stock in your exhaust piping, you have a leak, the y pipe is touching something.... just get under your car when it's cold and feel the flanges for leaking air.

sterling99SEL

I thought I remembered reading something about problems in the flex of some older Cattmans. Anyone know about this? This morning, I could tell the noise wasn't from under the hood, definately under the car near the flex. Maybe I'll try to record the sound later on and post it.

turbomax97

iTrader: (6)

either way, you will feel air coming out, if and when you do, get it fixed =)