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RHS GM LS Race Block UNIVERSAL

Brand: RHS | Category: Engine Blocks

Fitments

UNIVERSAL
54907U GM LS Race Block
Solid Aluminum, No Water Jackets
Deck Height Standard
U54908U GM LS Race Block
Solid Aluminum, No Water Jackets
Deck Height Tall
54900 GM LS Aluminum Race Block
Finish Honed
Bore 4.165in
Cylinder Sleeve Length 6.38in
Deck Height Tall (9.750)
54900U GM LS Aluminum Race Block
Ready To Hone
Bore 4.160in
Cylinder Sleeve Length 6.38in
Deck Height Tall (9.760)
54906 GM LS Aluminum Race Block
Finish Honed
Bore 3.900in
Cylinder Sleeve Length 5.87in
Deck Height Standard (9.240)
54906U GM LS Aluminum Race Block
Ready To Hone
Bore 3.895in
Cylinder Sleeve Length 5.87in
Deck Height Standard (9.240)
54901 GM LS Aluminum Race Block
Finish Honed
Bore 4.125in
Cylinder Sleeve Length 6.38in
Deck Height Tall (9.750)
54902 GM LS Aluminum Race Block
Finish Honed
Bore 4.165in
Cylinder Sleeve Length 5.87in
Deck Height Standard (9.240)
54903U GM LS Aluminum Race Block
Ready To Hone
Bore 4.120in
Cylinder Sleeve Length 5.87in
Deck Height Standard (9.250)
549106 GM LS Engine Main Cap Puller
54904 GM LS Aluminum Race Block
Unfinished
Bore 4.100in Unfinished
Cylinder Sleeve Length 6.38in
Deck Height Tall (9.760)
54905 GM LS Aluminum Race Block
Unfinished
Bore 4.100in Unfinished
Cylinder Sleeve Length 5.87in
Deck Height Standard (9.250)
54902U GM LS Aluminum Race Block
Ready To Hone
Bore 4.160in
Cylinder Sleeve Length 5.87in
Deck Height Standard (9.250)
54901U GM LS Aluminum Race Block
Ready To Hone
Bore 4.120in
Cylinder Sleeve Length 6.38in
Deck Height Tall (9.760)
54903 GM LS Aluminum Race Block
Finish Honed
Bore 4.125in
Cylinder Sleeve Length 5.87in
Deck Height Standard (9.240)

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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