Fits Following Engines: 294 CID GM (LS) Small Block Generation IV
Fits Following Engines: 325 CID GM (LS) Small Block Generation IV
Fits Following Engines: 364 CID GM (LS) Small Block Generation IV
Fits Following Engines: 427 CID GM (LS) Small Block Generation IV
Fits Following Engines: 376 CID GM (LS) Small Block Generation IV
Fits Following Engines: 325 CID GM (LS) Small Block Generation III
Fits Following Engines: 350 CID GM (LS) Small Block Generation III
Fits Following Engines: 364 CID GM (LS) Small Block Generation III
Fits Following Engines: 294 CID GM (LS) Small Block Generation III
Product Details
LS Race Bare Engine Block (54901U) by RHS®. Engineers at RHS® have designed a high-performance aluminum engine block for GM LS applications to meet the needs of race and street performance engine builders alike. Additionally, this innovative aluminum block features a raised cam centerline and outboard priority main oiling to allow rod clearance for a 4.600” stroke and to minimize windage in the crankcase. And for quality control assurance, RHS® conducts a CT scan (similar to a medical CAT scan) on each block to ensure maximum casting precision and consistency. When you combine unmatched finishing quality with added clearance for increased stroke applications, precision computer-aided design, and extra surface material to allow custom machining, you get the new benchmark for LS horsepower, torque, and durability.
Specifications
Type: Bored
Material: Aluminum
Bore: Hone to 4.120".
Cylinder Sleeve Length: 6.38"
Deck TYPE: Tall
Deck Size: 9.75"
Features
Rolled threads on all threaded holes for added strength
Gen III/Gen IV compliant with race mounts for Gen I, Gen II, Gen III & Gen IV engines
ARP main stud kit standard with enough material in castings to accommodate up to a ½” fastener
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RHS® 54901U - LS Race Bare Engine Block
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