Reviewed By Emmitt B (Honolulu, HI) Reviewed for a 2000 Pontiac Firebird —7/10/2017 11:04 PM
Smallest thing can make such a big difference in overall performance. Still monitoring mileage improvements.
Reviewed By MICHAEL K (ATOKA, OK) Reviewed for a 1998 Pontiac Firebird —7/15/2013 8:26 AM
After all the bolt-ons headers,throttlebody,coldair kit.hurst short throw shift,bushings,sub-frame rails,and labor of love the BIGGEST inprovement HYPERTECH tune-up made my ride like running a fueler!