I have a 2003 lx and I am about to buy ex headers and ex exhuast for my car. I am wandering what i need to do about a cat. Thanks

 

I know Megan Racing has a downpipe with the cat. built in, and that'd be what you'd need, since a cat-back won't reach the EX headers. So, just pick up a B-pipe / Downpipe with a Cat. built in from a place like Megan Racing, and you'll be fine.

 

I went with the dc race headers that have a pipe were the cat would be on the ex and then the apexi ws2 exhaust. I still have to get my o2 simulater.