My friends car: 90 integra LS with AEM intake, short shifter, generic muffler off ebay, no catalytic convertor, stock tires on stock 14" hubs

My car: 91 integra GS with generic intake, generic muffler off ebay, high performance tires on 15" gsr rims

He runs a 15.4, I run a 16.5. wtf? I know that he took off his cat and i still have mine, but would it really make more than a second of difference?

Another question, if i took off my cat, what would go in its place, some piping ? Also, if I took off my cat, would that lower my back pressure even more and reduce my torque. Also, does getting headers reduce back pressure and reduce torque also?

Well, the lack of a cat(or the fact that yours might be blocked) plus the short shifter could speed him up/slow you down. How much more do the GS-R rims weigh than his? that could be part of the problem, rotational mass plays big part in acceleration.

Then, no offense or anything, but he might just be a better driver than you. Were these times with the same driver or were you driving your car and he driving his?

He was driving his, i was driving mine. He might be a better driver, but im damn fucking fast at shifting, whenever someone drives with me for the first time they're like "hot shit dude you shift fast"

oh and a question about the short shifter, a friend of mine says you have to live up your car and take off your exhaust system and drop out the linkage from underneath the car to put on a short shifter