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Vehicle Info NeededGoodwrench LS7 427ci 7.0L Long Block Engine, 2006-2012 Corvette
Ships on 11/17/2026Free shipping
Lowest Price GuaranteeWithin its classic 427-cu-in displacement, engineers extracted Big-Block grunt from its high-revving Small-Block package. It features a unique, big-bore cylinder block that is anchored with a forged crankshaft, featherweight titanium connecting rods, and friction-coated pistons. But it's the airflow capability of the cavernous, CNC-ported heads that enables its tremendous power. Large-volume, straight-passage intake runners channel air directly through 2.20-inch titanium intake valves.
Contents:
- Engine block.
- Crankshaft and connecting rods.
- Pistons and piston rings.
- Cylinder head assemblies (including valve train components) and lifters.
- Camshaft.
- Timing gears and chain, timing chain dampener, front engine cover.
- Oil pump.
- valve rocker arm covers and oil pan.
Engine Break-In Procedure
Use only engine oil that meets dexos1 specifications. For track events or competitive driving, use Mobil 1 15W-50 engine oil. Fill the engine with oil and follow the proper engine priming procedure. Also check and fill as required any other necessary fluids such as coolant, power steering fluid, etc.
Start the engine and listen for any unusual noises. If no unusual noises are noted, run the engine at approximately 1000 RPM until normal operating temperature is reached. The engine should be driven at varying loads and conditions for the first 30 miles or one hour without wide open throttle (WOT) or sustained high RPM accelerations. Run five or six medium throttle (50%) accelerations to about 4000 RPM and back to idle (0% throttle) in gear. Run two or three hard throttle (WOT 100%) accelerations to about 4000 RPM and back to idle (0% throttle) in gear.
Change the engine oil and filter. Inspect the oil and the oil filter for any foreign particles to ensure that the engine is functioning properly. Drive the next 500 miles (12 to 15 engine hours) under normal conditions. Do not run the engine at its maximum rated engine speed. Also, do not expose the engine to extended periods of high load. Change the oil and filter again, inspect the oil and oil filter for any foreign particles to ensure that the engine is functioning properly.
Emissions Note:
This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.
CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART
A Living Legend with 427 Classic Cubic Inches!
Unleash factory-engineered supercar performance with the Chevrolet Performance 7.0L 505HP LS7 Crate Engine, available at JEGS. Built by Chevrolet Performance, this legendary LS7 crate engine delivers race-inspired power, precision engineering, and proven reliability straight from GM. Known for its massive displacement and high-revving capability, the Chevrolet Performance 7.0L 505HP LS7 Crate Engine is a top choice for enthusiasts seeking maximum horsepower and torque in a turnkey package. Whether for a restomod, track car, or high-end street build, this engine offers uncompromising performance backed by OEM quality.
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Performance Benefits & Key Features
The LS7 crate engine is engineered to produce an impressive 505 horsepower and approximately 470 lb-ft of torque, delivering explosive acceleration and strong top-end power. Its 7.0L displacement (427 cubic inches) provides exceptional airflow and combustion efficiency, making it one of the most powerful naturally aspirated LS engines available.
Key features include a lightweight aluminum block and cylinder heads, which reduce overall engine weight while improving heat dissipation. High-flow rectangular port heads, a performance camshaft, and titanium intake valves contribute to superior airflow and high-RPM capability. The forged steel crankshaft and high-strength internals ensure durability under demanding conditions, whether on the street or at the track.
This crate engine is designed for consistent, repeatable performance, with factory-level assembly and testing that eliminates the guesswork of custom builds. Enthusiasts benefit from instant throttle response, broad power delivery, and the confidence of a proven GM performance platform. It’s an ideal solution for those who want maximum output without sacrificing reliability.
Fitment, Compatibility & Applications
The Chevrolet Performance 7.0L 505HP LS7 Crate Engine is designed for compatibility with a wide range of GM LS-based platforms, making it an excellent choice for both direct replacements and LS swap projects. It fits seamlessly into vehicles originally equipped with LS engines, as well as custom builds requiring a high-performance upgrade.
Perfect for street performance, drag racing, and track-focused builds, the LS7 is commonly used in Camaros, Corvettes, Chevelles, and other classic muscle cars, as well as modern performance vehicles and custom hot rods. Its compatibility with various transmissions, engine mounts, and aftermarket components makes integration straightforward for experienced builders.
This engine is especially popular among enthusiasts seeking a naturally aspirated setup with race-level performance, as well as those building high-end restomods that demand both power and refinement. Its versatility allows it to perform equally well on the street and under competitive conditions.
Backed by Chevrolet Performance’s reputation for engineering excellence and race-proven durability, the LS7 crate engine delivers unmatched power and reliability. Explore the available options at JEGS to bring legendary LS7 performance to your next build and experience the pinnacle of naturally aspirated LS power.
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