i wouldn't worry about the CEL most good quality HFCs usually have a second slot for the O2 sensors, which is there exactly for that reason. So the likeliness of getting a check engine light is very low. Its much higher with Test Pipes. Which you shouldn't really be running anyways on public roads.
__________________
Evo-R Front Lip | RAZO Shifter Knob | Avant Garde Wheels | Hankook Tires | Berk HFCs | Agency Power CBE | AEM CAIs | Z1 Oil Cooler | Morimoto xB LED Halos | Tein Super Street | StopTech Rotors, Pads, SS Lines
|