Instant-G Stainless Boxster 3.2/3.4 Headers.
The stock Boxster uses 1-3/8″ tubing.  The Boxster “S” exhaust is a joke and actually necks down to less than a square inch before the catalyst.  Porsche had to figure out some way to get rid of 32 HP!

Here is a set of custom tips. Many styles available, inlet size 2.25″