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69225A PWHEADS 252CC CATHEDRAL PORT ALUMINUM CYLINDER HEADS COMPLETE (PAIR) FITS CHEVROLET GEN III LS1/LS2/LS6 LSX 3.90" BORE

Description

 

69225A PWHEADS 252CC CATHEDRAL PORT ALUMINUM CYLINDER HEADS COMPLETE (PAIR) FITS CHEVROLET GEN III LS1/LS2/LS6 LSX 3.90" BORE

LS1 11 Degree Chevrolet cathedral port heads designed to fit Gen III LS1/2/6 3.90" bore engines. 252cc intake runners, 62cc combustion chambers. For hydraulic roller cams up to .625" lift. Assembled with PW 2.08"/1.60" valves, PAC beehive springs, and related hardware. 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. Pair. 

Technical Specs
 
  • Rocker pedestal mount spacing is 2.115".
    Not for use with rocker systems that use guide plates or have pedestals with OE LS3 spacing.

    Head Gasket Cometic #C5475/5751-051 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) 252cc
    Intake Port Dimensions 3.22" x 1.12"
    Exhaust Port (cc) 101cc
    Exhaust Port Location Stock
    Exhaust Port Dimensions 1.63" x 1.73"
    Exhaust Gasket PW #423 or equivalent
    Intake Valve Size 2.08"
    Exhaust Valve Size 1.60"
    Valve Angle 11°
    Valve Spring Pocket O.D. 1.55"
    Valve Guide Size 8mm .500" (Top) .560" (Base)
    Deck Thickness .750"
    Combustion Chamber (cc) 62cc
    Spark Plug Size 14mm x .750" Gasket (eg. Autolite #3923)
    Spark Plug Location/Angle OE/Angle
  • Replacement parts
  • Intake Valves: PW 360043
  • Exhaust Valves: PW 360048
    Springs/Retainers/Locks/Locators: PAC PAC-KS13
    Viton Valve Seals: PW 360488


Available to ship

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  69225A PWHEADS 252CC CATHEDRAL PORT ALUMINUM CYLINDER HEADS COMPLETE (PAIR) FITS CHEVROLET GEN III LS1/LS2/LS6 LSX 3.90" BORE LS1... Read more

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SKU: 69225A PWHEADS 252CC CATHEDRAL PORT ALUMINUM CYLINDER HEADS COMPLETE (PAIR) FITS CHEVROLET GEN III LS1/LS2/LS6 LSX 3.90" BORE

2 in stock

$2,750.00 Excl. VAT

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      Description

       

      69225A PWHEADS 252CC CATHEDRAL PORT ALUMINUM CYLINDER HEADS COMPLETE (PAIR) FITS CHEVROLET GEN III LS1/LS2/LS6 LSX 3.90" BORE

      LS1 11 Degree Chevrolet cathedral port heads designed to fit Gen III LS1/2/6 3.90" bore engines. 252cc intake runners, 62cc combustion chambers. For hydraulic roller cams up to .625" lift. Assembled with PW 2.08"/1.60" valves, PAC beehive springs, and related hardware. 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. Pair. 

      Technical Specs
      		 
      • Rocker pedestal mount spacing is 2.115".
        Not for use with rocker systems that use guide plates or have pedestals with OE LS3 spacing.

        Head Gasket Cometic #C5475/5751-051 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) 252cc
        Intake Port Dimensions 3.22" x 1.12"
        Exhaust Port (cc) 101cc
        Exhaust Port Location Stock
        Exhaust Port Dimensions 1.63" x 1.73"
        Exhaust Gasket PW #423 or equivalent
        Intake Valve Size 2.08"
        Exhaust Valve Size 1.60"
        Valve Angle 11°
        Valve Spring Pocket O.D. 1.55"
        Valve Guide Size 8mm .500" (Top) .560" (Base)
        Deck Thickness .750"
        Combustion Chamber (cc) 62cc
        Spark Plug Size 14mm x .750" Gasket (eg. Autolite #3923)
        Spark Plug Location/Angle OE/Angle
      • Replacement parts
      • Intake Valves: PW 360043
      • Exhaust Valves: PW 360048
        Springs/Retainers/Locks/Locators: PAC PAC-KS13
        Viton Valve Seals: PW 360488


      Available to ship

      https://www.instagram.com/dustyroadstruckparts

      https://www.facebook.com/dustyroadstruckparts

      https://www.youtube.com/@dustyroadstruckparts

      Reviews

      69225A PWHEADS 252CC CATHEDRAL PORT ALUMINUM CYLINDER HEADS COMPLETE (PAIR) FITS CHEVROLET GEN III LS1/LS2/LS6 LSX 3.90" BORE

      69225A PWHEADS 252CC CATHEDRAL PORT ALUMINUM CYLINDER HEADS COMPLETE (PAIR) FITS CHEVROLET GEN III LS1/LS2/LS6 LSX 3.90" BORE

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