hey guys...headed down 2 the track 2nite and i was wondering if i should leave the stock exhaust on or unbolted...i want to get into the 13's and so far have accomplished 14.2 with minimal mods and bald tires...now got some new shoes, oil, race gas...which leaves me to the option of exhaust on or off???

 

Be sure to take the cat off too, thats where you will see most of your gains, and a CEL.