Im thinking of finishing off my exhaust with the Random Tech hi-flow cat... But- my ride is already putting off plenty of growl (sometimes I think its a bit loud)

Has anyone got feedback on the amount of extra noise I can expect if I throw the Hi-Flow cat into the mix? And/or what about HP gain?

I dont wanna do it if it will mean alot of additional noise for meager HP... Anyone know what to expect?

 

RT CATS are terrible. Get a carsound from WARPSPEED. I have it and it sounds just like with a stock cat. Given that you have a stillen cat-back it might be louder, certainly more raspy...