hey everyone i was hoping you all could throw alittle help my way. i did a search for the GMPP exhaust but i didn't see any actual performance numbers from this. does anyone know what the gains are or have dyno results from this? Thanks guys!

 

I know someone on here has dyno proven gains of 12 hp, I can't remember who it was though.

 

yea there is a post somewhere of I think JonyB getting 12hp from it

 

are both systems the same performance wise and just different sounding? thats what I'd like to know.

 

im pretty sure its the same numbers.

 

JonnyB dynoed like 12whp from the exhaust... I would actually imagine that the "touring" version might get a little less just b/c of a different muffler....

I'd expect a 10hp gain to be realistic... not too shabby at all.

 

I saw 12hp online somewhere else too.

 

Remember, that dyno showed 12 WHP... but I can't find the post either.

 

still 12whp for a catback..not to bad at all...now if u get a header and downpipe you see some good gains.

 

And a high-flow cat, that all should open up the whole exhaust system giving optimal performance

 

thanks guys!!! i'm still undecided as of right now as far as what kinda header i wanna get. i was thinking about a HAHN but i might just got with the GMPP manifold so if anything would ever go wrong i can say "well it's a GM part!" has anyone heard the difference in sound in person? is the GMPP performance cat-back noticeably louder? i heard the sound clip but it's hard to tell on a recording.

 

yeah you guys searched really hard haha-

https://www.cobaltss.net/forums/dyno-results-170/my-gmpp-catback-dyno-results-32554/