Originally Posted by
xfireon20z
i dunno graphite when i got my magnaflow exhaust and installed it my xfire was stock and after i installed it i noticed more low end torque and more 3k-6k pull so it had to add something more then 1 HP i have no dyno proof but you get to know a car after you drive it awhile and when you add pieces you just know when they improve the overall performance...
There are a lot of others who have done complete exhaust mods on our cars. Please read the posts on them and don't count on your 'butt' meter. I believe a few have dyno'd those exhaust mods, your better spending on a tune from Eurocharged. In the end it's your $ so either do a lot more reading or go and do what you will. Good luck either way.