I just purchased the header, but I don't know if I should install it...I'm sort of an impulse buyer. Will I notice any gains since the header was meant to be used with the SC? Will the stock donut gasket fit or do I need a different one. Let me know what you guys think. Also, should I ditch my tp for a 70mm?

 

Where did you get the header might I ask?

 

Bump. Did you buy it new or used?

 

craigslist, used..

 

I would ditch the 63mm Megan test pipe and get the 70mm testpipe from Berk or the like.