i purchased 4-2-1 dc sport headers, ws2 cat back system and injen intake i am getting different answers from people on whether to leave the stock CAT or purchase a high flow magnaflow cat?
i have 2001 4cyl 2.3l 4dr accord lx

 

it's fine to have it. If you are not getting a tunable ecu and getting a tune after you install your parts I would recommend KEEPING your cat. B/c your cat give you the back pressure you need to keep your a/f ratio from running really rich. I always recommend getting a chipped ecu and a tune after you install performance parts.

 

I don't think our ECU is tunable, unless you get an OBDI ECU like a P28 or something like that. With my exhaust the car does run richer than before.

 

yes correct he will need to swap to OBD1 with a chipped p72/p28.

 

If he swaps to an OBDI ECU, he may have problem getting it inspection/emission correct ?

 

yes correct. But he is adding a intake and exhaust. He is going to fail anyways...unless he paid HIGH dollar for the C.A.R.B rating parts.

 

Up here, i can get my car to pass inspection with my set up with a silencer as long as the check engine light isn't on.

 

power to ya. It's hard to pass with parts added. Look at all the Cali guys they have a hard time. My buddy has a build h22 and he can't pass the test with his h22 so when it comes time he swapped his stock f22a back in. It's a PITA but he can still drive his build engine on the street.