On a 2002 you won't gain as much. 00/01 have to REGAIN what the 02+ ECU does anyway. The 00/01 cars dyno less than 02+, so the 10-15 will be there but maybe 5-10 on the 02+. Above 8300 RPMs though, you'll gain up to 20 horses.

 

My VAFC gained 8 hp and 6 lbs of tq.

 

I gained like 1or 2 hp with my VAFC. 2 different tuners, waste o money