Racing Head Service (RHS) 54240-06 - Pro Action Un-Assembled LS1 Cylinder Head w/ .570" Lift LS6+ Springs

Description

Racing Head Service (RHS) - 54240-06

Pro Action Un-Assembled LS1 Cylinder Head w/ .570" Lift LS6+ Springs

This RHS LS1 Head comes un-assembled: perfect for porting projects. Includes premium COMP Cams valvetrain parts to withstand up to .570" valve lift. Includes our 26906 LS6+ 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: 1.282/1.077

Valve Spring Installed Height: 1.8

Valve Spring Seat Pressure: 92

Valve Spring Open Pressure at Max Lift: 312

Valve Spring Retainer Material: Steel

Valve Spring Maximum Valve Lift: 0.57

Valve Stem Seal Type: Nitrile Rubber

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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Racing Head Service (RHS)

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