440LSX
08-01-2011, 07:54 PM
what size ? my buddy is ordering cut outs
Pontiac G8 2008-2010 - stock exhaust size
View Full Version : stock exhaust size
dragonrage
08-02-2011, 10:41 AM
Why? Just to be obnoxious sounding and illegal while gaining no power?
Patrick G
08-02-2011, 11:20 AM
Stock exhaust is 2.25" from the cats back.
440LSX
08-02-2011, 02:47 PM
Why? Just to be obnoxious sounding and illegal while gaining no power?
:hijack: Not my car,not my problem.
Stock exhaust is 2.25" from the cats back.
The car's over an hr away thanks for the help!
:hijack: Not my car,not my problem.
Stock exhaust is 2.25" from the cats back.
The car's over an hr away thanks for the help!
96WS6guy
08-02-2011, 07:53 PM
Every dyno comparison I've seen shows a decent gain with cut-outs opened.
04gtoher
08-03-2011, 08:36 PM
Every dyno comparison I've seen shows a decent gain with cut-outs opened.
ive seen 17-20 hp so far,while doing research
ive seen 17-20 hp so far,while doing research
Patrick G
08-04-2011, 05:13 PM
ive seen 17-20 hp so far,while doing researchDepends on what power level they're at. At 400rwhp, the stock G8 GT axle back mufflers cost you 4-5rwhp. At 500rwhp, they cost you closer to 13-15rwhp. So if you have just bolt-ons and are internally stock, cutouts are mostly a sound mod and not a performance mod.