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Racing Head Service (RHS) 54240-05 - Pro Action Un-Assembled LS1 Cylinder Head w/ .660" Lift Dual Springs

Racing Head Service (RHS) 54240-05

$864.55 $785.95
Special Price: save $78.60
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Part Number:
54240-05
SKU:
DXKK-54240-05
UPC:
036584405719
Availability:
Special Ordered - Not In Stock
DISCLAIMER - THIS ITEM IS A SPECIAL ORDERED PART:
This item is Special Ordered - product is subject to the return and cancellation policy as seen in our terms and conditions. This may result in cancellation restrictions, or higher than normal restocking fees.

Racing Head Service (RHS) - 54240-05

Pro Action Un-Assembled LS1 Cylinder Head w/ .660" Lift Dual Springs

This RHS LS1 Head comes un-assembled: perfect for porting projects. Includes premium COMP Cams valvetrain parts to withstand up to .660" valve lift. Includes our 26925 springs, stainless valves, premium guides and seals.

Don't bother searching through junkyards for 243 or 799 casting heads, the RHS Pro Action LS1 Cylinder Head is a better option. Manufactured from premium materials to the industry's tightest tolerances, the RHS Pro Action Cathedral Port Head for GM LS1/LS2/LS6 is a far better option. Compatible with stock components along with COMP Cams premium valvetrain components, the RHS Pro Action Head is ready to bolt on, requiring no milling or clean up like junkyard pieces. Available bare, un-assembled for porting projects as well as pre-assembled, the RHS Pro Action LS1 Cathedral PortCylinder Head is a great choice for your next 4.8, 5.3, 5.7, 6.0 and 6.2 GM LS project!

Compatible GM LS Engines (RPO Codes): LS1/LS6/LS2/LQ4/LQ9/LM7/LR4/LM4/L33
Accessory Bolt Holes Drilled?: Yes
CNC Ported?: No
CNC-Machined Exhaust Runner?: No
CNC-Machined Intake Runner?: No
Combustion Chamber Volume: 65
Cylinder Head Finish: As Cast
Cylinder Head Material: Aluminum
Exhaust Port Location: Stock
Exhaust Runner Volume: 75
Exhaust Valve Diameter: 1.55
Exhaust Valve Stem Diameter: 8
Exhaust Valve Length: Stock
Exhaust Valve Material: Stainless Steel
Exhaust Valves Included: Yes
Grade Type: -
Head Gaskets Included?: No
Heat Crossover?: No
Includes Valve Locks?: Yes
Includes Valve Spring Retainers?: Yes
Includes Valve Springs?: Yes
Intake Port Location: Stock
Intake Port Shape: Cathedral
Intake Runner Volume: 210
Intake Valve Angle: 15
Intake Valve Diameter: 2
Intake Valve Stem Diameter: 8
Intake Valve Length: Stock
Intake Valve Material: Stainless Steel
Intake Valves Included: Yes
Machined for O-Ring?: No
Push Rod Diameter: 5/16
Rocker Arm Nut Thread Size: -
Rocker Arm Nuts Included: No
Rocker Arm Studs Included?: No
Rocker Arms Included: No
Spark Plug Style: Tapered or Gasketed
Valve Guide Material: Bronze
Valve Guides Included?: Yes
Valve Guide Outer Diameter: 0.5
Valve Seat Machine Style: 3 angle
Valve Seat Material: Powdered Metal
Valve Seats Machined?: Yes
Valve Spring Seat Diameter: 1.3
Valve Springs Included?: Yes
Valve Spring Diameter: 1.29
Valve Spring Installed Height: 1.8
Valve Spring Seat Pressure: 145
Valve Spring Open Pressure at Max Lift: 463
Valve Spring Retainer Material: Steel
Valve Spring Maximum Valve Lift: 0.66
Valve Stem Seal Type: Viton®
Valve Stem Seals Included?: Yes
Flow at 0.100" Valve Lift: N/A
Flow at 0.200" Valve Lift: N/A
Flow at 0.300" Valve Lift: N/A
Flow at 0.400" Valve Lift: N/A
Flow at 0.450" Valve Lift: N/A
Flow at 0.500" Valve Lift: N/A
Flow at 0.550" Valve Lift: N/A
Flow at 0.600" Valve Lift: N/A
Flow at 0.650" Valve Lift: N/A
Flow at 0.700" Valve Lift: N/A
Chevrolet Parts OE Number: 12564243

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