RZR Valve Guides

We just received our first shipment of RZR valve guides. They are made from Ampco 45 Aluminum Bronze, and have Our Proprietary design. Made for stock or ported engines. They will Increase flow in a stock port. Correct Length for valve lifts over.480" when used with HPD's Light Weight Valve Spring sets. Intakes have provisions for valve seals and Exhausts have a raised center to shed oil. They are sold each or in sets of 4 with 2 intake seals.