tzoid
Enthusiast
I think www.smokemup.com is a website that has a program where you can actually calculate what your looking for. For what it's worth, my '99GTS is generally stock (tubes, K&N's and Corsa 3" with Hi Flo cats)along with 3.55's from Unitrax, and I'm thrilled with the 3.55's. Almost feel guilty about not doing any other mod's over this current winter....Zaino'd her today though, getting ready for Spring!