Hey this may be a dumb question but can you mate a 3" or 70mm exhuast with a 2.5" collector on a header or lets say to a 2.5" test pipe.

To all the guys with the 70mm exhuast how does this work with a small diameter header.

Thanks

 

Call your local machine shop. I bet this can be done.

 

If the mating flange matches up, no problem.