Recently i installed the obx headers on my car.. Install was rather lengthy and stressful (time constraints and not knowing what i was doing, driving around open header LOL) but overall im rather inpressed with the extra power its given.

Power seems to really hit harder now, as opposed to smoother acceleration
Now seems slightly louder engine-wise
Also gives a noteable ticking noise at idle, i guess its the added valvetrain noise, also can be heard from tailpipes which i found rather awesome

Overall, im pretty happy! Camshaft on the way ill see how that turns out..

 

Any CEl issues? What did you do for a cat

 

Well after the first time I really got on it, it came on and off, however once I erased it, it wer away permanently. But the again it may have been because I didn't put the o2 sensor back.. As for cats, I reuse the stock one since the hi flow ones melt

 

Any issues with the mount on the block? Do they fit perfectly? I remember on some BMW's they needed to be modified in order to fit perfectly without any leaks.
How much gains are we looking at?

 

No issues at all.