gmmg hp gain?

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Sep 9, 2009 | 03:23 PM

9D4Z28

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From: Stow Ohio

gmmg hp gain?

my gmmg catback came in today, does anyone know how much hp i will gain from a gmmg catback on a stock 94 z28 ?

Sep 9, 2009 | 04:43 PM

RamAir95TA

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From: South Jersey

Maybe 8whp.

Sep 9, 2009 | 04:48 PM

djjab57

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From: Texas

But it will sound like more !

Sep 9, 2009 | 05:54 PM

trippinholyman

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From: bodymore

I thought the general consensus for cat-backs was 10-20 rwhp?

I know after I installed my Loudmouth, the car threw me back in the seat. I would wager, maybe almost 15 rwhp! But that's sotp dyno, dunno what you would get on a real dyno...

Sep 9, 2009 | 06:06 PM

harner

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From: New Ringgold, PA

I'd say maybe 5, it'll sound good though!

Sep 9, 2009 | 06:16 PM

94Z28-MSTGKLR

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From: Lacey, WA

My GMMG was the first thing I did to mine when it was stock and to be honest, the only difference I seen was a big drop in my average mpg and the amazing sounds of "bad ***" pouring out the tail pipes!!!

Sep 9, 2009 | 09:25 PM

za355tx

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From: Dfw

A 3 inch catback over a stock catback should yield about 10 or so HP. A tune alone would probably get you more but if you were to do a good cold air setup with a 3 inch exhaust and a tune you'd be looking at 25-30 hp gain. Just info for you.