Yep X pipe has been around for a while and even air cooled car run them.

 

Can someone help me with some header advice? I just installed some really beautiful ones I got on ebay, but have no idea what the brand is

Anyway, they went in fine with no fitment issues, and the car sounds a little better and there is a small but noticeable bump in power. It's say maybe 10hp

Anyway, here is the problem. I noticed that sometimes there is a bit of hesitation when I nail the throttle at low speeds now and sometimes the idle gets a little jumpy. It's almost as if the ECU is having a hard time understanding what changed on the engine.

I used to own a corvette and did headers and had the ecu retuned to take advantage of the headers. Does the 997 work the same way? Do I need a "tune" on this car as well? Did any of you guys notice some low rev issues after header installs?

 

I have too experienced this with my gundo'd exhaust, it's minor and sporadic however.

 

My non-gundo'd, non-tuned C2S would do this from time to time. I think that's just something these cars do sometimes.

 

Cool, thanks for the feedback.