Product Overview
Cast From Prime A356 T6 Aluminum, 85cc Exhaust Port Volume As Cast, Made in the USA, Heads are Cast w/High Flow Ports, 20 Degree Inline Valves, 145 lbs. 1.80 in. Valve Spring Closed Pressure, 358 lbs. 1.175 in. Valve Spring Open Pressure, Steel Alloy Intake/Exhaust Valve Seats, Manganese-Bronze Valve Guides, 63cc CNCd Combustion Chamber, 204cc Intake Port Volume As Cast
