This is my new ride wih a puch head with 6mm studs that I widened to fit my 8mm studs. I won it off on ebay a while back for $10. I never used it because it wasnt a direct fit, but when I stripped the spark plug hole on my slant head I said what a perfect opportunity to rig it up. It only has one gasket with black gasket maker $3.99 at autozone and I used the extra gasket from the kit that I never had to use. My bpr6hs has two oil seal rings on it. Puch head has tons off compression compared to the slant head and mine was sanded down considerably, no lie. Another benefit to me is it muffles the engine noise somewhat.