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Brodix BR7 300cc 12* CNC Ported Bare Castings - 1 PairBRODIX delivers the industry's most durable replacement for the LS style cylinder heads. The BP BR 7 300 BS is 100% CNC ported and flows over 437 cfmBP BR 7 300 BS™12° Valve Angle300cc Intake Ports2.250 / 1.580 Valve Sizes (Not Included)Flows Over 400 cfm100% CNC PortedNew High Flowing Exhaust for Turbo/Blower UseLarge Valve Spring Pockets for Roller CamSpecial Rockers RequiredA45 Copper Exhaust Valve Seats72cc combustion chambersBare heads, No parts