Well a couple weeks ago I went to my local track, US131 Motorsports Park. I had my whole exhaust on (Headers, X pipe, cat back), and the intake. I went a best of 14.7. NOW the big deal is that I have about 250 pounds of stereo in my trunk....yea I like the thump. But I am curious about how much time I could shave off if I were to drop that weight. Also I just put my 3.73 gears in and im going to the track this friday night so we'll see what that did for me!

 

every 100 pounds you drop is good for about .1 sec

 

While you are at it pull out the spare and the jack. You can drop close to 300 lbs. total and about 3 tenth's. The 3.73's should be good for a couple tenth's too.

 

you should pick up some with the gear unless you light the tires off the line. especially if you're running street tires.