69255 PWHeads Chevrolet LS3 LSx 262cc 11 Degree Rectangle Port Aluminum Cylinder Heads Pair (bare)
Performance World 69255 PWHeads Chevrolet LS3 LSx 262cc 11 Degree Rectangle Port Aluminum Cylinder Heads Pair (bare)
 
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LS3 11 Degree Rectangle Port Chevrolet heads designed to fit LS large bore engines. 262cc intake runners, 70cc combustion chambers. 2.165" intake and 1.60" exhaust. Machined for 1.55" springs. Raised valve cover rails, 6-bolt per cylinder design (Fits LSX blocks too). Includes rocker arm rails for use with LS3 offset (OE style) rocker arms. SEE SPECIAL TECHNICAL NOTES REGARDING ROCKER ARMS. Manufactured from A356-T6 aluminum. Each pair comes with a detailed flow sheet. Sold bare and ready for assembly. Pair. Download Data here - DOWNLOAD NOTE: MUST USE THREAD SEALANT ON ROCKER STAND BOLTS AS THEY INTERSECT THE INTAKE PORTS! CUSTOM PISTONS ARE REQUIRED DUE TO THE 11 DEGREE VALVE ANGLE!
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Product Code: 69255
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Description Technical Specs
 
LS3 11 Degree Rectangle Port Chevrolet heads designed to fit LS large bore engines. 262cc intake runners, 70cc combustion chambers. 2.165" intake and 1.60" exhaust. Machined for 1.55" springs. Raised valve cover rails, 6-bolt per cylinder design (Fits LSX blocks too). Includes rocker arm rails for use with LS3 offset (OE style) rocker arms. SEE SPECIAL TECHNICAL NOTES REGARDING ROCKER ARMS. Manufactured from A356-T6 aluminum. Each pair comes with a detailed flow sheet. Sold bare and ready for assembly. Pair. Download Data here - DOWNLOAD NOTE: MUST USE THREAD SEALANT ON ROCKER STAND BOLTS AS THEY INTERSECT THE INTAKE PORTS! CUSTOM PISTONS ARE REQUIRED DUE TO THE 11 DEGREE VALVE ANGLE!
Optional Parts
  • 2.165" x 5.45" x 8mm Intake Valves = PW #360044
    1.60" x 5.45" x 8mm Exhaust Valves = PW #360048

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