The Core of LS Power – Build Your Dream Engine with the LS376/525 Long Block The Chevrolet Performance LS376/525 Long Block offers builders a cost-effective foundation to create a custom LS engine that matches their specific needs. Designed as the core of the powerful LS376/515 crate engine, this long block delivers the proven durability and performance of the Gen IV LS-series V-8. It’s perfect for builders looking to complete their assembly with their choice of intake manifold, ignition system, and accessories. This 376 c.i. (6.2L) powerhouse is built with premium components, including a cast aluminum block, hydraulic roller camshaft, and aluminum L92-style cylinder heads, delivering modern LS performance and reliability. What’s Included? The LS376/525 long block provides the core essentials: Chevy F-Body Wet Sump Oil Pan for compatibility with a range of applications. Nodular Iron Crankshaft and hypereutectic pistons for durability. L92-Style Aluminum Cylinder Heads with high-flow ports and 68cc chambers. Fully assembled bottom and top ends, ready for your custom finishing touches. Performance Highlights Displacement: 376 c.i. (6.2L) Compression Ratio: 10.7:1 – Optimized for premium pump gas. Camshaft Specs: Hydraulic Roller Lift: 0.525" intake / 0.525" exhaust Duration (@ .050): 226° intake / 236° exhaust Cylinder Heads: 68cc combustion chambers for efficient compression. 2.165" intake valves and 1.590" exhaust valves for superior airflow. Maximum Recommended RPM: 6,600 Built for Strength and Versatility Block Features: Cast Aluminum Block (P/N 12623967): Lightweight and durable with 6-bolt, cross-bolted main caps for stability. Rotating Assembly: Nodular Iron Crankshaft (P/N 12597569): Designed for strength and reliability under high-performance conditions. Powdered Metal Connecting Rods (P/N 12607475): Engineered for durability. Hypereutectic Aluminum Pistons (P/N 19207287): Built for high-compression performance. Rocker Arms: Investment Cast with Roller Trunnions: Smooth and efficient valve operation with a 1.7:1 ratio. Why Choose the LS376/525 Long Block? This long block is ideal for builders and enthusiasts looking to: Customize an LS engine with their preferred intake manifold, ignition, and fuel system. Upgrade their Camaro, C10, Corvette, or Chevelle with modern LS performance. Build a reliable and powerful engine for pre-1976 street vehicles or off-road projects. Key Specifications: Horsepower: Potential output depends on your custom configuration. Torque: Build it your way to achieve your performance goals. Induction: Ready for your intake manifold and fuel system. Important Notes: Custom Assembly Required: Does not include electronics, intake manifold, fuel system, or ignition. Vehicle Compatibility: Ideal for pre-1976 street vehicles or off-road vehicles. Not intended for marine applications.
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