Quick94LT1

iTrader: (4)

A friend of mine has a 4" y pipe made for my pacesetter longtubes and was wondering if it would kill power in my car? I will have a AI H/C by the end of summer spraying a 100 shot.

Lawhead

iTrader: (14)

Think ive read not 100% sure that a single 3 inch will support 500 HP before its a restriction but not 100% on that

CamaroRacing12

iTrader: (5)

imo the more flow the better. so no it wont hurt power.

lt1-xjs

I'd say more like 300 hp.

hitmanws6

iTrader: (20)

Nope run it, no ill affects

Blackbirdws6

iTrader: (7)

4" isn't going to hurt anything. If you have the room, do it.

Lawhead

iTrader: (14)

Highly doubt its 300 people almost push that stock though just a catback

Puck

iTrader: (17)

It won't hurt anything, but any gains depend on your exhaust.

You won't gain anything going from 3" collectors to a 4" Y then down to a stock skinny catback pipe.

Exhaust will only flow as well as the most restrictive point.

96TransAmboosted

iTrader: (8)

You alway post . Really 300 lmfao a simple bolt on car makes that through factory piping. 500 seems about right

I would use it a reap the rewards from better breathing, more air in more air out better power.

lt1-xjs

It amazes me that people throw on long tubes with 3-3 "1/2 collectors and funnel it down to a 3" catback. I can assure you you will create more horse power with a 2 1/2" dual set up over a single 3" set up anyday. Is there really anyone on here that has 500 hp and runs a single 3" exhaust, I highly doubt it, I don't think it can be done, and that's no BS. Duals yes, single no.

Wicked94Z

iTrader: (26)

IIRC quik95lt1 gained 70rwhp by removing his hooker y pipe and 3" magnaflow catback. That was when he was about the 620hp level, it'd probably be more now!

boostedlt1

iTrader: (2)

i'm making around 500hp at the engine, possibly more, possibly less. i'll find out in two weeks. but i'm running a 3" single exhaust.

Verz

iTrader: (21)

Believe this is a pretty good guideline on how much each can support
https://ls1tech.com/forums/2987587-post19.html

gregrob

iTrader: (8)

Pretty sure your "rear mount turbo" negates a direct comparison here

LigHtEmUp01

i dont think it matters the bigger it is the less restriction but i honestly dont think u will notice anything

Awake455

Apples to oranges but I do very well all across the power band with 4" exhaust...and am exceedingly happy with the sound

boostedlt1

iTrader: (2)

haha i know