Catalytic

[noypi]

I just bought my rmf headers and already have a muffler and a customize catback. also i have a eg b16a2.do i just keep my oem or get a different one. if i need a cat how much does it help and whats a decent brand to get. thnx guys

[trism]

You need a cat because its illegal not to.

use the oem one, or just buy a highflow one from an exhaust shop.

[gumus89]

If you drive behind a car without a catalytic converter you will know it. It smells like shit. If a cop drives behind you then prepare for a tens of thousands of dollars butt ****ing by the Environmental Protection Agency.

Get a high flow one if you can.

[Lukey]

high flow, the smaller oem cat will slightly bottle neck the increased flow of the bigger aftermarket headers

[dougie_504]

High flow, 100cel. Same diameter as your cat-back.