Exhaust Questions

i know its not true but im starting to believe that all 02+ GT's came w/ Flowmasters Welded in... every one that i have seen lately that was "stock" has had weld in flows.

now that i have the stupid statement/question out of the way... how retrictive is the stock Catback and what size is it? should i get a midpipe before i change my catback as it has already had the mufflers replaced? and how does the MAC Prochamber compare to other midpipes.
 
RoadconeTuning said:
i know its not true but im starting to believe that all 02+ GT's came w/ Flowmasters Welded in... every one that i have seen lately that was "stock" has had weld in flows.

now that i have the stupid statement/question out of the way... how retrictive is the stock Catback and what size is it? should i get a midpipe before i change my catback as it has already had the mufflers replaced? and how does the MAC Prochamber compare to other midpipes.


well the stock dia. is 2.25" and it is very restrictive, a O/R prochamber with a C/B will give you good gains and there dia. is 2.5"