Fleece Performance LSR-SD10X - Aluminum LS Standard Deck Race Block

Description

Step up to competition-grade aluminum foundation with the Fleece Performance Freedom Series® LSR Standard Deck Wet Aluminum Block (Part # FPE-LSR-SD10X). 100% engineered, cast, machined, and assembled in Indiana, USA, the Freedom Series LSR race block provides high-power Gen IV LS builds with exceptional structural rigidity while retaining straightforward compatibility with OEM LS accessories, covers, and cylinder heads.

Designed for demanding boosted, nitrous, and high-RPM naturally aspirated applications, this wet aluminum block incorporates ductile iron sleeves that provide superior wear resistance and impact absorption. A priority-main oiling system feeds critical bottom-end components first to maximize bearing protection under sustained extreme cylinder loads. The block arrives with M10 8740 alloy main studs (190,000 PSI tensile strength), precision-ground steel cam thrust plate, Dura-Bond cam bearings, and a dedicated LSR rear cover assembly.

Kit Components & Inclusions

• Freedom Series LSR Aluminum Engine Block: Standard 9.251" deck wet block with ductile iron sleeves.
• Fasteners: High-strength M10 main studs manufactured from 8740 alloy steel (190,000 PSI tensile strength).
• Camshaft Hardware & Bearings: Dura-Bond GMP-9 camshaft bearings and precision-ground 1018/1020 steel cam thrust plate.
• Rear Cover Package: LSR-specific billet rear cover, rear cover gasket, rear main seal, and installation hardware.
• Driveline Alignment: Transmission dowel pins.
• Plugs & Hardware: Engine block plug kit and oil galley barbell plug.

Product Specifications

Machining & Builder Notes

• Pre-Assembly Machining Required: This race block is shipped semi-finished for custom blueprinted engine builds. The builder must execute:
  • Final deck surfacing (0.011" additional deck material provided).
  • Final cylinder hone to your piston diameter (ductile sleeves shipped at 4.110" ID).
  • Final line hone on the crankshaft main bore (0.003" extra material provided).
• Finished Bores: Camshaft and lifter bores arrive completely finish-machined and ready for precision bearings and lifters.
• Mandatory Pre-Assembly Wash: As with all competition engine blocks, thorough cleaning and inspection are required prior to assembly and break-in. Verify that all oil galleys, rifle passages, and blind bolt holes are clean and clear of machining debris.
• OEM Accessory Alignment: Engineered to accept standard Gen IV LS front timing covers, water pumps, valley covers, and bellhousings.