hey guys, im new to the site & a proud new G owner. i was wondering i already put in an aem cold air intake in & was wondering what kind of horsepower gain i would get if i added stillen hi flow cats, exhaust, and a motrodyne 5/16 plenum spacer.will the spacer void my warrenty? thanks

 

welcome to the forums..i would say with aem cai,sillenHFC,exhaust and 5/16 spacer id say you would get like 15-30 hp...im just guessing here someone correct me if im wrong

 

^^^sounds about right.

 

^^ they are right and no it should not void your warranty

 

thanks guys!!!!

 

^^^ thats only with a tune

 

I'd guess 15 whp, mostly due to the plenum spacer.