I was thinking of adding a catless downpipe before my tune. How much hp have you guys seen by just swapping out down pipes?
D Darkhrse99 · Registered Joined May 29, 2009 · 52 Posts Discussion starter · #1 · Jun 16, 2009 View full thread I was thinking of adding a catless downpipe before my tune. How much hp have you guys seen by just swapping out down pipes?
I was thinking of adding a catless downpipe before my tune. How much hp have you guys seen by just swapping out down pipes?
D Darkhrse99 · Registered Joined May 29, 2009 · 52 Posts Discussion starter · #6 · Jun 17, 2009 View full thread SRH_STi said: Do you mean without a tune? Or with a tune but without a catback? Click to expand... With a tune, I already have a catback.
SRH_STi said: Do you mean without a tune? Or with a tune but without a catback? Click to expand... With a tune, I already have a catback.
