ABOUT THIS PRODUCT

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. To go beyond the limitations of other existing LS blocks, the new RHS LS Race Block is available in both standard deck and tall deck height configurations. 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 computeraided design and extra surface material to allow custom machining, you get the new benchmark for LS horsepower, torque and durability.

Product Features:

• Designed from heavy-duty A357-T6 aluminum material
• Standard Deck Height (9.250)
• 5.87" Cylinder Sleeve Length
• 4.120" Bore
• 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)