Fleece Performance GM LSR Freedom Series Standard Deck Solid Aluminum Block

Increased Coolant Flow, Decreased Coolant Temperatures The rear cylinders on the 5.9/6.7L Cummins suffer from a lack of coolant flow, and therefore, experience the highest coolant temperatures. This can cause excessive pressure to build in the cooling system, especially the rear of the block and blow out freeze plugs externally, or the smaller diameter plugs under the valve cover, leading to a failure. Our coolant bypass kit adds a secondary thermostat, that unlike other brands, works based on temperature instead of excessive pressure. This solves the problem before pressure becomes an issue by ensuring consistent temperatures across all six cylinders. Benefits: Lowers coolant temperature at the rear cylinders Ensures consistent temperatures across all cylinders Prevents damaging coolant pressure build up Complete kit comes with braided hose and AN O-ring fittings to ensure a leak-free installation. Kits for MY 2003+ include billet hose brackets. Why do I need a Fleece Coolant Bypass? One of the biggest issues on the 5.9/6.7L Cummins is the coolant flow problem to the rear cylinders. This can cause catastrophic failure or blow outs of the freeze plugs in an over-temperature / over-pressure condition. The Fleece Coolant Bypass is one of the most important additions you make to improve the reliability and longevity of the Cummins platform. Application Notes: The 2003 - 2007 5.9L automatic transmission version will eliminate the factory transmission fluid heat exchanger. The heat exchanger is designed for use in cold climates to warm the transmission fluid with the engine coolant.

• 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.
• 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.
• 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.
• Exclusive domed main cap design provides for maximum crankshaft support.

The Fleece Performance GM LSR Freedom Series Standard Deck Solid Aluminum Block is engineered for high-performance applications, offering exceptional strength and durability. Crafted with premium billet construction, this block utilizes 7/16-14 main studs and M10 side bolts, along with dowels on the inner studs of the block, ensuring superior clamping force and precise fitment. Its enhanced design includes additional stock to the front and rear valley walls for increased structural integrity, along with a minimum 0.625-inch skirt wall thickness for added robustness. The heavy-duty deck measures 0.750 inches thick, providing increased durability for demanding engine builds. This engine block features a cross-braced lifter valley, which offers added structural support and facilitates individual drain backs, improving overall reliability. The lightweight design, weighing only 120 pounds with main caps, ensures high strength without sacrificing performance or ease of handling. The block’s maximized crankshaft saddle radius is optimized for high-stress conditions, and the exclusive domed main cap design provides maximum crankshaft support, enhancing overall engine stability. Incorporating ductile iron sleeves, this block delivers a durable, wear-resistant surface with improved shock absorption for high-performance environments. The complete construction is reinforced with an exoskeleton combined with Hot Isostatic Pressing (HIP), ensuring the highest quality casting standards. This product is essential for enthusiasts looking to improve engine reliability and longevity, especially in high-stress or racing applications. Please note, this engine block is not CARB approved and requires acknowledgment of Prop 65 compliance. It is a critical upgrade for those seeking a robust, reliable foundation for their Cummins-powered builds, designed to withstand the rigors of performance driving and demanding conditions.

Features:

• Billet main caps: Premium construction with 7/16-14 main studs, M10 side bolts, and dowels for superior clamping and fitment.

• Enhanced design: Extra stock added to valley walls with a minimum 0.625-inch skirt wall thickness for increased strength.

• Priority Oil System: Rifling provides priority oil feed to critical bottom-end components, reducing heat and wear.

• Ductile iron sleeves: Durable, wear-resistant surface with improved shock absorption for high-performance use.

• Reinforced exoskeleton with Hot Isostatic Pressing (HIP): Ensures highest quality casting and structural integrity.

• Cross-braced lifter valley: Adds structural support and individual drain backs for reliability.

• Heavy-duty deck: 0.750-inch thickness for enhanced durability in demanding applications.

• Lightweight design: Weighs only 120 pounds with main caps, combining strength with ease of handling.

• Optimized crankshaft saddle radius: Designed for high-stress conditions, maximizing performance.

• Domed main cap design: Provides maximum support for the crankshaft, ensuring engine stability.