chevy_silverado07

hey guys im runnin long tube pacesetter headers with no cats 3inch y pipe borla exhaust im wanting to put a exhaust cutoff with switch.....is there any gains or is it just louder??

08cheyennesc

iTrader: (2)

I see about 1 tenth gain in the 1/8 mile track with the cutout open but I have the stock muffler.

Ferocity02

iTrader: (59)

Your exhaust is already pretty open, I doubt you will get much of any gains from it. It will just be louder depending on where you mount it.

Atomic

iTrader: (42)

If you already have an exhaust you probably won't see any gains it will just be louder

chevy_silverado07

The y pipe I have now is a 2 inch getting it swapped out for a 3inch but will probably do the cutoff just Cuz that mean sound

tylertxss

iTrader: (2)

I had DMH E cutouts and now I have a 3" cat back and no Y with gutted cats and 2 3" SI/SO XR1's and I dont think its any louder, the cutouts will seem louder bcuz they will be under the cab imo. I cant speak to performance tho.

$ierraLY5

I have a supercharged cammed 5.3 blowing through 1-3/4" long tubes, high flow cats, and a 3" gibson single exhaust. I ran it on the dyno last month and it made the exact same numbers with my exhaust dump open and closed, no difference, just louder.

outlawz2004

iTrader: (18)

I was running duals with an slp loudmouth I series(basically straight pipes), and I still ran 2/10ths faster in the 1/4 with the cutout open, most of this was because it lost low end and kept the truck from spinning on the line,but I feel it pulls harder on top end with it open.