Racing Head Service (rhs)
RHS Cam Bearings 549202-1 Bearing, Steel Backed Babbitt, Chevy, Each
rhs549202-1
A$25.33
RHS LS Bare Race Blocks 54903U Engine Block, Aluminum, 6-Bolt Mains, 4.125 in. Diameter Bore, 1-Piece Rear Main Seal, Chevy, LS, Each
RHS LS Bare Race Blocks 54903U Engine Block, Aluminum, 6-Bolt Mains, 4.125 in. Diameter Bore, 1-Piece Rear Main Seal, Chevy, LS, Each
A$13,653.86
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Description
These RHS LS bare race blocks are designed to meet the needs of today's high performance engine builders and racing enthusiasts. These blocks are available in standard and tall deck height combinations and are engineered for maximum clearance around a 4.600 in. stroke crankshaft. With their unique design, RHS engineers were able to minimize windage in the rotating assembly, leading to superior engine lubrication at higher rpm. To make them friendly for existing race applications, these blocks contain both factory and motor plate race mounts for Gen I, II, III, and IV engines. RHS LS bare race blocks each receive a CT scan to ensure maximum performance and consistency.
Standard features include:
* Designed from aircraft-quality A357-T6 aluminum
* Siamese cast bore walls (4.125 in. or 4.165 in. diameter) with press-in cast iron sleeves
* Machined with 55mm cam bearing journal
* Available in standard (9.240 in.) and tall (9.750 in.) deck heights with beefy deck thicknesses (.500 in. standard/.750 in. tall deck); standard (5.87 in.) and tall (6.38 in.) deck cylinder sleeves are available
* 6 head bolt design with full water jacket around the cylinders' walls; large windows in the valley allow access to an inboard 6th head bolt
* Block design includes large front and rear AN-12 side feeds for serious dry sump setups
* Material for oversized lifters with lifter bosses that are designed to clear tie bar style lifters
Part Type
LS Aluminum Block - 4.120 Bore 9.240 D/H
Specifications
- Product Attributes - Brand
- Racing Head Service (RHS)
- Product Attributes - Manufacturer's Part Number
- 54903U
- Product Attributes - Part Type
- Engines, Bare Blocks
- Product Attributes - Product Line
- RHS LS Bare Race Blocks
- Product Attributes - UPC
- 036584209522
- Product Attributes - Main Journal Type
- Chevy LS
- Product Attributes - Engine Block Material
- A-357 Aluminum
- Product Attributes - Engine Block Style
- OEM
- Product Attributes - Engine Block Deck Height
- Standard deck
- Product Attributes - Deck Height (in.)
- 9.240 in.
- Product Attributes - Cylinder Bore as Shipped
- 4.115 in.
- Product Attributes - Cylinder Bore Diameter
- 4.125 in.
- Product Attributes - Maximum Bore Diameter (in.)
- 4.165
- Product Attributes - Camshaft Location
- Standard
- Product Attributes - Main Bolt Style
- 6-bolt
- Product Attributes - Main Caps Included
- Yes
- Product Attributes - Main Cap Material
- Steel
- Product Attributes - Main Cap Fasteners Included
- Yes
- Product Attributes - Main Bearings Included
- No
- Product Attributes - Rear Main Seal Style
- 1-piece
- Product Attributes - Finished Cylinder Bores
- No
- Product Attributes - Raised Cam Location
- Yes
- Product Attributes - Cam Bearings Included
- No
- Product Attributes - Freeze Plugs Included
- Yes
- Product Attributes - Remanufactured
- No
- Product Attributes - Quantity
- Sold individually.
- Product Attributes - Special Attention
- Block is bored but needs finish honed.
Reference Information
| Brand Name/s | Racing Head Service (rhs) |
|---|---|
| StreetFX SKU | rhs54903U |
| SFX Item ID | 5247105 |
| Supplier Item Code | 5247105 |
| Manufacturer SKU | 54903U |
| Manufacturer UPC | N/A |
| Alternative References | 6-Bolt, 1-Piece |
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