Hi,
I've 4 ST 60 with 4 different heads.
Can somebody please explain me the
advantages-disadvantages from these
different shapes?
Thank you
Dietmar
That will take a long long post, but quickly, you have a Bellhead on the left, which was some of the first lower compression heads, then you have the more compressed "squish band" heads, which are higher compressed, and add more power.
more later
Randy