The Tillotson 212R uses a non-Hemi head very similar to the Predator 212 Non-Hemi, with 27mm intake and 25mm exhaust valves with 5mm stems. We carry many upgradeable parts for the stock cylinder head and many options for aftermarket heads with bigger valves and stronger springs. We also have a full range of aftermarket rocker arms, valve springs, push rods, and retainers for your heads.
