Does anybody know the major differences betqween these two heads? *I believe the 670 twin piper as you can find on a '95 Mach 1 has a higher compression ratio than the single pipe 670 as in a '98 MXZ 670 or even the '99 670 HO.

I'd like to transplant a single-pipe head onto a twin-pipe 670 but I'm not too sure about head geometry, squish, etc.

Any insight would be appreciated.

-Rob

Moved to Skidoo

Are the part numbers different?