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

[BYprodriver]

Originally Posted by Bigsmoothlee

I dont think the 996 intake manifold bolts onto the 3.2 head, I had to drill my 3.4 heads to accept a Boxster intake manifold ( I didnt want to lower my engine 1.5" )

So I agree, the restrictions of the 3.2 are the complete intake and exhaust systems.

As JR posted the head castings are the same, & all bolt bosses are there. You just have to drill & tap the holes for the intake & exhaust parts you are using.




986 3.2 head has untapped bolt bosses to mount heat shields in 996s