I have searched and searched but cannot find any real details on the Invidia header.

Does anyone know the collector size of it? Is it made to mate up with the 70mm test pipe and exhaust?

Also, on a side note, if I plan on getting a 70mm test pipe and exhaust, I would want a header that matches that, correct? Correct me if I am wrong, but my understand was it was always best to have the same size piping through from header back.

Thanks

 

it's 63mm..