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54906U - RHS GM LS Race Block

This part should fit your vehicle. It is a universal part.

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Part #: 54906U
Notes: GM LS Aluminum Race Block
Ready To Hone
Your Price: $5,904.83
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Specs

Bore 3.895in
Cylinder Sleeve Length 5.87in
Deck Height Standard (9.240)

This Item Also Available In

Part Number Price Notes & Specs
54907U $0.00 Notes GM LS Race Block
Solid Aluminum, No Water Jackets
Deck Height Standard
U54908U $0.00 Notes GM LS Race Block
Solid Aluminum, No Water Jackets
Deck Height Tall
54900 $5,970.45 Notes GM LS Aluminum Race Block
Finish Honed
Bore 4.165in
Cylinder Sleeve Length 6.38in
Deck Height Tall (9.750)
54900U $4,849.01 Notes GM LS Aluminum Race Block
Ready To Hone
Bore 4.160in
Cylinder Sleeve Length 6.38in
Deck Height Tall (9.760)
54906 $5,970.45 Notes GM LS Aluminum Race Block
Finish Honed
Bore 3.900in
Cylinder Sleeve Length 5.87in
Deck Height Standard (9.240)
54901 $5,970.45 Notes GM LS Aluminum Race Block
Finish Honed
Bore 4.125in
Cylinder Sleeve Length 6.38in
Deck Height Tall (9.750)
54902 $6,029.41 Notes GM LS Aluminum Race Block
Finish Honed
Bore 4.165in
Cylinder Sleeve Length 5.87in
Deck Height Standard (9.240)
54903U $5,847.08 Notes GM LS Aluminum Race Block
Ready To Hone
Bore 4.120in
Cylinder Sleeve Length 5.87in
Deck Height Standard (9.250)
549106 $234.19 Notes GM LS Engine Main Cap Puller
54904 $5,904.83 Notes GM LS Aluminum Race Block
Unfinished
Bore 4.100in Unfinished
Cylinder Sleeve Length 6.38in
Deck Height Tall (9.760)
54905 $5,847.08 Notes GM LS Aluminum Race Block
Unfinished
Bore 4.100in Unfinished
Cylinder Sleeve Length 5.87in
Deck Height Standard (9.250)
54902U $5,847.08 Notes GM LS Aluminum Race Block
Ready To Hone
Bore 4.160in
Cylinder Sleeve Length 5.87in
Deck Height Standard (9.250)
54901U $5,847.08 Notes GM LS Aluminum Race Block
Ready To Hone
Bore 4.120in
Cylinder Sleeve Length 6.38in
Deck Height Tall (9.760)
54903 $5,970.45 Notes GM LS Aluminum Race Block
Finish Honed
Bore 4.125in
Cylinder Sleeve Length 5.87in
Deck Height Standard (9.240)

All Fitments

UNIVERSAL
Year Model SubModel Cylinders Liter Aspiration Eng Desg. Fuel Notes
0 - 0 NON APPLICATION SPECIFIC ALL ALL ALL ALL ALL ALL

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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