The FPE-LSR-FMJ-SD10X is a premium aluminum Gen V LS Standard Deck Race Block designed for high-performance applications. Engineered with precision and built for durability, this race block delivers unmatched strength and compatibility with OEM LS accessories. Whether you're upgrading for competitive racing or seeking peak performance, the FPE-LSR-FMJ-SD10X ensures reliability and excellence in every detail. Proudly made in the USA, it's a perfect choice for serious enthusiasts and professionals alike.
Billet main caps: Premium billet construction ensures stability and precision fitment. Utilizes 7/16-14 main studs and M10 side bolts along with dowels on the inner studs of the block for superior clamping and reliability.
Enhanced design: Includes additional stock to the front and rear valley walls for increased strength along with minimum 0.625-inch skirt wall thickness and a complete reinforced exoskeleton.
Enhanced design: Includes additional stock to the front and rear valley walls for increased strength along with minimum 0.625-inch skirt wall thickness.
The LSR block is semi-machined and requires final machining to the builder's final specifications for the application, required machining includes:
Priority Oil System: Oil rifling provides priority oil feed to the critical bottom-end components, reducing heat, wear, and risk of failure.
Ductile iron sleeves: Provide a durable wear-resistant surface with improved shock absorption to handle high-performance applications.
Complete reinforced exoskeleton combined with Hot Isostatic Pressing (HIP) ensures the highest quality casting available.
Cross-braced lifter valley: Provides added structural integrity and individual drain backs for improved reliability.
The camshaft and lifter bores are finished, honed, and ready for precision bearings and lifters.
Heavy-duty deck thickness: Features a robust 0.750-inch deck thickness for enhanced durability.
Lightweight: Weighs only 120 pounds with main caps, offering a strong yet lightweight solution.
Maximized crankshaft saddle radius: Optimized for performance under high-stress conditions.
Final OD on the crankshaft mains (0.003 additional provided for the final hone)
Fleece Performance GM LTR Freedom Series Standard Deck Solid Aluminum Block
Exclusive domed main cap design provides for maximum crankshaft support.
Final deck surface (0.020 additional provided on the deck surface)
Main studs: 7/16 -14, AMS6304 alloy (220,000 PSI tensile strength)
Final cylinder hone (sleeve inside diameter of 4.110 provided)
Freedom Series LTR Standard Deck Solid Aluminum Block
Freedom Series LSR Standard Deck Solid Aluminum Block
Precision ground 1018/1020 Steel cam thrust plate
The engine block is shipped with the following:
LSR rear cover, rear cover gasket, and hardware
Head studs: Threaded for 1/2 -13 bolts/studs
Maximum Cylinder Bore Size: 4.185
Fleece Performance Engine Block
Lifter Bore: 0.8430" - 0.8435"
Main Bore: 2.7475" - 2.7485"
Durabond GMP-9 cam bearings
Cam Bore: 2.3075" - 2.3088"
TECHNICAL SPECIFICATIONS
Transmission dowel pins
Oil galley barbel plug
Cylinder Bore: 4.110
Deck Height: 9.251
Rear main seal
BUILDER NOTES
Engine Block
IN THE BOX
FEATURES
Plug kit
