I want to buy a DC Sports 4-1 header soon. Uh, i have heard that u need a aftermarket cat or O2 simulator or sumthin like that?? i dont know exactly wat to do. i got the hardcore emissions standards over here in cali...
Thanks,
Shane

 

if you get a high flow cat you won't have the CEL problems and you'll be fine on emissions.

 

How does that work? And does anyone have experience with or know of any good high flow cats?
thanks