ok, recently purchased resonated test pipes which i should be getting soon, and i was wondering what headers i should get to maximize my exhaust flow. the thing about the question is the tp are 2.5" id and i was thinking if i should choose a header collector diameter of 2.5" to match the tp? would that be too big for n/a. i plan to go 2.5" throughout the exhaust system.

 

The inner diameter of the header collector is about 60 mm. You are good to go.

 

thanks for the reply, now i gotta go header shopping. its hard though cause not many company's list the collector diameter.