New!  68276A-2 PWHeads Chevrolet LS3 LSx 273cc 15 Degree Rectangle Port Aluminum Cylinder Heads Pair (assembled)
Performance World 68276A-2 PWHeads Chevrolet LS3 LSx 273cc 15 Degree Rectangle Port Aluminum Cylinder Heads Pair (assembled)
 
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LS3 15 Degree Rectangle Port Chevrolet heads designed to fit LS (4.00") large bore engines. 273cc intake runners, 69cc combustion chambers. For hydraulic roller cams up to .650" lift. Assembled with PW 2.165"/1.59" valves, PW PRO660 dual valve springs, and related hardware. Raised valve cover rails. 6-bolt per cylinder design (Fits LSX blocks too). Requires OE LS3 rocker arm rails (GM#12600936). Manufactured from A356-T6 aluminum. Each pair comes with a detailed flow sheet. Pair. Download Data here - DOWNLOAD NOTE: MUST USE THREAD SEALANT ON ROCKER STAND BOLTS AS THEY INTERSECT THE INTAKE PORTS!
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Product Code: 68276A-2
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Description Technical Specs
 
LS3 15 Degree Rectangle Port Chevrolet heads designed to fit LS (4.00") large bore engines. 273cc intake runners, 69cc combustion chambers. For hydraulic roller cams up to .650" lift. Assembled with PW 2.165"/1.59" valves, PW PRO660 dual valve springs, and related hardware. Raised valve cover rails. 6-bolt per cylinder design (Fits LSX blocks too). Requires OE LS3 rocker arm rails (GM#12600936). Manufactured from A356-T6 aluminum. Each pair comes with a detailed flow sheet. Pair. Download Data here - DOWNLOAD NOTE: MUST USE THREAD SEALANT ON ROCKER STAND BOLTS AS THEY INTERSECT THE INTAKE PORTS!
Optional Parts
  • Rocker Arms: PW 369173

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