you have to remove your bumper cover, and the actuall steel bumper. mark the area that needs to be cut and go to town with a sawsall or something similar. i just cut out the middle section completely on mine. you will also have to trim your bumper cover unless you have a body kit on the car already. hope this helps.
Mike
North Shore Performance Auto
Your Performance Parts Specialist
[email protected]
Tomei, Sard, Hks, Greddy, Tein, Defi, Bride ect........