How can a 911 3.4 have so much more HP than a 3.2 Boxster S?

[Jake Raby]

The two engines share the same head castings and camshafts as well as the crankcase, with only an altered bore size.

The 3.2S engine has the most potential for additional performance in stock form by far. Thats because it was seriously handicapped at the factory, BUT the factory did this in a way that didn't cost them much money.

330HP from a 3.2 base engine is our starting point these days, 350 is routine with the Gen 5 combinations. :-)