4P F20C S2000 BARE RACE CASTING Tools It increases the seat pressure

It increases the seat pressure more than 20 psi on the seat to help control valve bounce and will allow safe operation up to and beyond 9000 rpm

Furthermore

dyno tuned

Oversize Intake Valve Seats

chamfer bearing housings and bottom of cylinder bore

4P F20C S2000 BARE RACE CASTING Tools It increases the seat pressureIN STOCK SHIPS NOW Now you can purchase our Race Castings bare and ready for you to machine yourself. We have been asked by engine builders worldwide for us to supply them with our superior Race Castings so that they could further develop their own engine programs. Now you can purchase them here and receive bulk discounts right on our website. The cylinder heads come as shown in the photos with all mating faces machined, seat bores and spring seat