69255 PWHeads Chevrolet LS3 LSx 262cc 11 Degree Rectangle Port Aluminum Cylinder Heads Pair (bare)
Alternative Views:	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! Everyday Low Price: CDN $1,629.99 Stock Status:(Coming Soon!) Product Code: 69255 Qty: Email me when Back-In-Stock

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! NOTE: MUST USE THREAD SEALANT ON ROCKER STAND BOLTS AS THEY INTERSECT THE INTAKE PORTS! NOTE: CUSTOM PISTONS ARE REQUIRED DUE TO THE 11 DEGREE VALVE ANGLE! Rocker pedestal mount spacing is 2.17". Not for use with rocker systems that use guide plates or have pedestals with OE LS3 spacing. Head Gasket Cometic #C5751-051 or equivalent Head Bolt Torque Refer to OE spec Head Bolts ARP #134-3610 Head Studs ARP #234-4317 Rocker Arms OE LS3 style ONLY (No stud/guideplate conversions etc.) Intake Port (cc) 262cc Intake Port Dimensions 2.62" x 1.31" Exhaust Port (cc) 104cc Exhaust Port Location Stock Exhaust Port Dimensions 1.70" x 1.815" Exhaust Gasket Remflex #2008 or equivalent Intake Valve Size 2.165" Exhaust Valve Size 1.60" Valve Angle 11° Valve Spring Pocket O.D. 1.64" Valve Guide Size 8mm .500" (Top) .560" (Base) Deck Thickness .750" Combustion Chamber (cc) 70cc Spark Plug Size 14mm x .750" Gasket (eg. Autolite #3923) Spark Plug Location/Angle OE/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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