obx header + obc cat back
 

has anyone used the obx header with the obx cat back. form the looks of the pics, it looks like it replaced your cat with a esonater, thats how it was on my obx header on my focus. thatmeans you would be replaceing everthing from the motor back. Do the odx parts fit well? built well. i would think replacing all of the pipe would give you a decent increase in hp

i know the header fit fine. have the 4-2-1. i was tempted to buy the catback on eBay but just settled for a good price on a used TRD.

but if you do get it, post up since I would be interested to know how it works out.