I own a 2002 chevy trailblazer 4x4 with the I6. I went to San Antonio Raceway last night and got some realy good results. I did take out the passenger side headlight and grill for ram air. All runs were done in 4awd and launched at 2400-2600rpm The first run i got 16.2 at 88 mph. Then i got a 16.1 at 88.xx. Im not sure if something is wrong with my 4awd but it was engaging late (usually it sense the rear slip a lil then engage the front, maybe its just mine). I then lowerd the tire pressure to 22psi in the rear. Next Pass was 15.93 @88, then a 15.84@88, then a 15.79@89. My 60fts were from 2.4 to 2.3. My tb weight was 4725lbs. Im pretty satisfied with my times for the mods i have, which are dual intake, with a custom exhaust(bullet muffler dumped at the rear axle). Went from a 16.9 stock to a 15.79 with 2 mods, now only if there are any more mods avaible. Any feedback would be appreciate.