Jimmy WS6

I have the $1,400 corsa catback exhaust on my 2000 trans am ws6 and im going to be buying hooker longtube headers soon. Therefore, i'm gonna be needing a y-pipe. I keep hearing that I need to keep my tsp catted y pipe because the high flow cats that are on it will keep the rasp away. If I were to go with a or-y, would I hear a lot of rasp with corsa catback, hooker longtubes, and or-y? Should I keep and use my catted y-pipe?

NVR_SPDS

iTrader: (39)

hi flow cats and a quality merge will help knock out the rasp.

MikeWS6

Yes run a catted Y pipe. Everyone that bitches about rasp is running an off road y.

TXZ28LS1

iTrader: (5)

I think it will sound sick with corsa, and longtubes with an Off road y pipe. Rasp is really horrible with Loudmouth. That is rasp. It shouldnt be that bad with corsa.

usafws6

iTrader: (10)

damn 1400 catback!!

MikeWS6

I have heard that set up (Corsa+LT's+ORY) with a cam and it was really raspy. Maybe it would be better on stock internals?

Titanws6

iTrader: (35)

Custom ORY + Flowmaster merge will do the trick

TXZ28LS1

iTrader: (5)

Thats pretty surprising man. I know people think magnaflow is raspy..LOL.. its not even close to raspy. I honestly think that these Fbodies are raspy, and throaty sounding period. Except for probably GMMG, and Duals.

180ls1

iTrader: (4)

Maybe maybe not, i would say go with that setup with a bullet muffler in the y pipe and that will take away the rasp. It did with my magnalflow and ory and i have a crap merge.

Titanws6

iTrader: (35)

The merge is what is gonna cause the rasp, the better the merge, the less the rasp. To the OP, check this out I just saw in the classifieds....

https://ls1tech.com/forums/parts-cla...ex-y-pipe.html

180ls1

iTrader: (4)

I would say it is caused more by removing the cats but yes the merge has a good amount to do with it.

The Mighty Texan

iTrader: (4)

^I agree. 1400 for exhaust holy ****, the only exhaust that i would spend that much on is a full LT and TD set up.

TechCam97

iTrader: (5)

I tried a few different ORY setups but nothing ever fully got rid of my rasp. I just said screw it and got some true duals, no more rasp!

hitmanws6

iTrader: (20)

You need cats, trust me. My friend has a corsa (albeit cammed), but even when he was bolt ons it was raspy as hell. Just get the cats/merge. The merge will offset the minimal loss from adding cats

ncsu602

iTrader: (10)

Mac mids, custom y with gutted hi flows, Flowmaster merge, and a Hooker catback on a cammed Z and I have absolutely no rasp.

I'll gladly take that Corsa off your hands if you need someone to dispose of it!

TORCHD 02 TA

iTrader: (39)

Jesus there needs to be a damn sticky about rasp..

Guys, using a FM merge ISN'T going to kill the rasp.. Take it from me, who has O/R Y with a GMMG c/b....

On my Custom Kooks O/R Y, yes I have a FM merge.. Rasp was still there..

What KILLED the rasp (about 98%) was adding a powerstick in my I-pipe..

If you do a search on my name in this section with any GMMG thread I ALWAYS pop up and give my .02


EDIT: here's an example... https://ls1tech.com/forums/generatio...ls-y-gmmg.html

omarrakeen

iTrader: (2)

FM merge with larger diameter than your Y pipe + small bullet in the I pipe should kill it!

TORCHD 02 TA

iTrader: (39)

ding ding ding... we have a winner!!!

omarrakeen

iTrader: (2)

**** ^ i didnt not see your post am sorry. and i said kill just like you ..stupid browser.

TORCHD 02 TA

iTrader: (39)

Hey man great minds think alike