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RHS GM LS Race Block UNIVERSAL

Brand: RHS | Category: Engine Blocks

Fitments

UNIVERSAL
54907U LS Race Block
GM
Standard Deck 9.250
No Water Jackets
54900 LS Block
Tall Deck 9.75 in.
4.165 in. Bore
54900U LS Block
Tall Deck 9.75 in.
Hone To 4.165 in.
54906 LS Block
Standard Deck 9.24 in.
3.900 in. Bore
54906U LS Block
Standard Deck 9.24 in.
Hone To 3.895 in.
54901 LS Block
Tall Deck 9.75 in.
4.125 in. Bore
54902 LS Block
Standard Deck 9.24 in.
4.165 in. Bore
54903U LS Block
Standard Deck 9.24 in.
Hone To 4.120 in.
54904 LS Block
Tall Deck 9.760 in.
4.100 in. Bore
5.87 Cylinder Sleeve Length
Unfinished
54905 LS Block
Standard Deck 9.250 in.
4.100 in. Bore
6.38 in. Cylinder Sleeve Length
Unfinished
54902U LS Block
Standard Deck 9.24 in.
Hone To 4.160 in.
54901U LS Block
Tall Deck 9.75 in.
Hone To 4.120 in.
54903 LS Block
Standard Deck 9.24 in.
4.125 in. Bore
549102 Cam Thrust Bearing
LS Block Only
Brass
549401-SET LS Race Block Head Gasket Set
For 4.125 in. Bore
Incl. PN[549401-L/549401-R]
Engine Make/Size Chevy LS Series
549204-1 LS Block Thrust Plate O-Ring
Replacement O-Ring For Thrust Plate
549306-1 Cam Retainer Plate Bolt
549402-SET LS Race Block Head Gasket Set
For 4.2in. Bore
Incl. PN[549402-L/549402-R]
Engine Make/Size Chevy LS Series
549201-1 Main Cap Dowel Pin
For LS Aluminum Race Block Main Caps
549101 Rear Seal Cover
For RHS LS Block
549120 Piston Oiler Kit
LS Race Block
Billet Alloy Steel
54908U LS Race Block
GM
Tall Deck 9.750
No Water Jackets
549150 LS Block Torque Plate
For Use w/Fire Ring On 4.125 in. Or 4.165 in. Gasket
549200-1 Aluminum -12AN Port Plug
For LS Aluminum Race Block
Fitting Size -12AN
Material Aluminum
549400-SET LS Race Block Head Gasket Set
For 4 in. Bore
Incl. Right And Left Gaskets
Engine Make/Size Chevy LS Series

Product Description

This new block is built specifically for the drag race market and is an ideal fit within rules that do not allow billet blocks by specifying they must be cast. A solid water jacket design featuring A357-T6 aluminum material provides the superior crankcase strength and improved rigidity perfect for crank-mounted superchargers and blowers. The block utilizes the LSX 6-head-bolt design as in the original LS Race Block, but the head stud fasteners’ diameter has been increased to 1/2” for the inboard head studs and 3/8” for the 5th and 6th head bolts. The larger fasteners provide additional clamping force for increased head gasket retention. This is required for the higher cylinder pressures common in boosted applications.

  • 4.100” Bore, solid water jacket design
  • Larger head stud fasteners
  • Standard & tall deck options
  • Strict quality control measures

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