How much Horsepower gain and how much torque would i gain from a cat back Borla 2.5 inch exhaust?

 

Motor, year, and tranny?

 

go with techtonics, uses borla mufflers. the piping is 2.5 inches. and to answer your question, you'll see minor changes in your daily driving and how the car reacts, but nothing drastic. if you want drastic power differences get it chipped.

 

yea before i did any other engine modifications to my car, i had to replace my exhaust and i went with the 2.25" Borla system that AWE sells.. and it claims 15hp difference but i didnt see much on the butt dyno.. car pics up a little smoother and stuff, but you really will feel more of a difference when its combined with other things like test pipe, ECU, etc..

 

Any upgrades you do depend on a world of other factors. Mostly the condition of the rest of your car and the components those upgrades need to be in good shape to get full effect.