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Edelbrock

Edelbrock RHS LS Aluminum Race Block (Ready to Hone) 9.250in Standard Deck - 4.120in Bore

Manufacturer part number: 54903U

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CODE: EDE54903U
$6,904.95 Backorder — not currently in stock Sold out
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This item is on backorder. A shipping date is not confirmed. Contact us for current lead time: 609-249-4921.

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Block Specifications: Designed from heavy-duty A357-T6 aluminum material; 4.125”-4.165” siamese cast bore walls w/ press-in spun cast iron liner; Available in standard (9.240”) & tall (9.750”) deck heights w/ beefy .750” deck thickness; Both standard deck (5.67”/5.87”- same as LS7) & tall deck (5.94”/6.38”) cylinder liner lengths available; “Long arm friendly” – Accommodations for up to 4.6” stroke w/ standard rod pin diameters (2.100”) & oversized 60mm camshaft; Main cap surface area maximized at mating surface & large fillets from cap to cross bolts for added strength; Designed for clearance – side oil galley moved outboard & engineered rod clearance come standard; Significantly increased windage passage area under bores & around caps over LS7/LSX engines; 6 head bolt design w/ full water jacket around the cylinders (based on LS7 design); Bay-to-bay breathing improved w/ increased side window area versus LSX & LS7; Extra-large windows in valley for access to inboard “6th” head bolt; Extra-long liners for standard (5.87”) & tall (6.38”) decks

Warranty
User 1
Installation Instructions
Product Specifications Sheet
  • P1 MFG main stud kit standard with enough material in castings to accommodate up to a 0.5 inch fastener
  • Gen III/Gen IV compliant with race mounts for Gen I, Gen II, Gen III & Gen IV engines
  • Rolled threads on all threaded holes for added strength
  • Chilled main bearing bulkheads for added strength
  • Optimized billet main caps & improved windage