LS 5.3L Crate Engine 400hp Long Block - Gen 3 24x

Product details

Unleash Raw Power with the LS 5.3L Crate Engine 400hp Long Block – Gen 3 24x

Experience the legendary performance and unmatched versatility of the LS platform with the Spoon Parts USA LS 5.3L Crate Engine 400hp Long Block – Gen 3 24x. This isn’t just an engine; it’s the heart of your next high-performance build, designed for those who demand power, reliability, and precision. Built as a brand-new unit, this long block represents the pinnacle of modern V8 engineering, delivering a formidable 400 horsepower right out of the crate. Whether you’re a seasoned builder, a performance enthusiast, or simply looking to breathe new life into your project, this engine provides the perfect foundation. Don’t settle for less – when you’re ready to buy a powerhouse, choose Spoon Parts USA for unparalleled quality and service.

Originating from GM’s renowned Gen 3 architecture, this 5.3L LS long block retains the core strengths of the platform while being optimized for substantial power output. The 24x reluctor wheel signifies its compatibility with a wide range of control systems, offering flexibility for various custom applications. Our commitment is to provide you with a product that meets rigorous quality control standards, ensuring you receive an engine that performs flawlessly from day one. When you purchase from Spoon Parts USA, you’re not just getting an engine; you’re investing in performance and peace of mind.

Key Features and Specifications

• Engine Type: LS 5.3L V8 Long Block
• Horsepower: Approximately 400hp (actual figures may vary based on ancillary components and tune)
• Generation: Gen 3 LS Architecture
• Reluctor Wheel: 24x (ideal for various ECU setups)
• Condition: New, never used or rebuilt.
• Displacement: 5.3 Liters (325 cubic inches)
• Block Material: Cast Iron (for exceptional durability)
• Cylinder Heads: Aluminum (for weight savings and efficient cooling)
• Crankshaft: Factory-style, robust construction
• Connecting Rods: Durable OEM-equivalent or better
• Pistons: High-quality, designed for performance and reliability
• Camshaft: Performance-oriented grind to achieve 400hp rating
• Oil Pan: Standard design (may require application-specific pan for certain swaps)
• Valve Covers: Standard OEM style
• Intake Manifold: Not included (allows for custom selection)
• Front Timing Cover: Included
• Water Pump: Not included
• Flywheel/Flexplate: Not included
• Mounting Bosses: Standard LS bolt pattern for easy fitment in various chassis.

This long block arrives ready for your choice of intake, carburetor or fuel injection system, accessories, and tuning. Its 24x reluctor wheel is a common choice for those utilizing aftermarket ECUs or earlier factory systems, providing broad compatibility. We understand the importance of getting your project moving, which is why we ensure quick processing and reliable shipping directly to your shop or driveway. For those who prefer a different kind of solution, we also offer exceptional Remanufactured Engines, Transmissions & Other Powertrain Components.

Applications and Fitment

The LS 5.3L Crate Engine, with its 400hp output, is an incredibly versatile powerhouse suitable for a vast array of projects. Its compact design (for a V8) and proven architecture make it a favorite for:

• Classic Car Restorations: Modern power in a vintage shell.
• Hot Rods and Street Rods: Reliable performance for cruising or drag.
• Off-Road Vehicles: Excellent torque and horsepower for challenging terrains.
• Custom Builds and Kit Cars: The go-to choice for dependable V8 power.
• Muscle Car Upgrades: A significant boost over original engines.
• Truck Swaps: Ideal for upgrading older truck platforms for more hauling and towing power.

Given its Gen 3 24x configuration, it’s particularly well-suited for enthusiasts who are comfortable with aftermarket engine management systems or those replacing earlier 5.3L engines that used a similar reluctor. Always verify component compatibility with your specific vehicle or project before ordering. If you’re looking for an OEM replacement option, consider our range of Goodwrench / GM Service Engines which often include more complete assemblies.

Installation Notes for Our Customers

While this is a brand-new long block, successful installation requires a good understanding of LS engine architecture and general automotive mechanics. Here are some key considerations:

• Ancillary Components: You will need an intake manifold, fuel system (or carburetor), alternator, power steering pump, water pump, pulleys, exhaust manifolds, and engine management system to complete this engine. These are not included.
• Engine Management: The 24x reluctor is compatible with numerous aftermarket ECUs. Ensure your chosen ECU is compatible and properly tuned for a 400hp 5.3L LS.
• Cooling System: A robust cooling system is essential for any performance engine. Upgrade your radiator, fan, and hoses as needed.
• Fuel System: A high-volume fuel pump and adequate fuel lines will be necessary to support 400hp.
• Exhaust: Appropriately sized headers and exhaust system will allow the engine to breathe efficiently and reach its full potential.
• Oil Pan Clearance: Depending on your chassis, an aftermarket oil pan may be required for proper clearance.
• Accessory Drive: Plan for a complete accessory drive system (FEAD – Front End Accessory Drive) that fits your specific application.
• Professional Installation Recommended: If you are not experienced with engine swaps, we strongly recommend professional installation to ensure optimal performance and longevity.

Spoon Parts USA wants your build to be a success. We are available to answer questions and assist with your purchase to ensure you get the right parts for your project.

Warranty and Quality Assurance

Spoon Parts USA stands behind the quality of its products. This brand-new LS 5.3L Crate Engine 400hp Long Block – Gen 3 24x is covered by a manufacturer’s warranty, details of which will be provided with your purchase. As a new unit, it has undergone rigorous testing and quality control processes to ensure it meets our high standards for performance and durability. Unlike REMAN Chevy/GMC 5.3L Engine Long Block (No Core Charge) VIN P, B, T, Z, U options, this engine uses all new components, offering maximum longevity and fresh performance.

Why Buy from Spoon Parts USA?

Choosing Spoon Parts USA for your LS 5.3L Crate Engine means choosing a partner dedicated to your automotive success. We are more than just a retailer; we are enthusiasts who understand the passion behind every build. Here’s why customers trust us:

• Expertise: Our team possesses deep knowledge of transmissions, transfer cases, and drivetrain parts, including high-performance engines.
• Quality Products: We only source and sell products that meet stringent quality standards. This new crate engine is a testament to our commitment to excellence.
• Competitive Pricing: We strive to offer the best value for your money. Get this incredible 400hp LS 5.3L long block at a competitive price.
• Fast & Reliable Shipping: We know you’re eager to get your project going, so we prioritize quick and secure delivery across the USA.
• Dedicated Customer Service: Have questions? Need guidance? Our support team is here to help you every step of the way, from selection to post-purchase support.
• Extensive Inventory: Beyond this impressive crate engine, we offer a comprehensive range of drivetrain components to support all your automotive needs.

Ready to power up your project? Don’t wait. Buy this LS 5.3L Crate Engine 400hp Long Block today and transform your vehicle into a street or track beast!

Frequently Asked Questions (FAQ)

Q: Does this engine come with a warranty?

A: Yes, being a brand-new production long block, it comes with a manufacturer’s warranty. Specific terms and conditions will be provided with your purchase documentation. Please inquire for full details before ordering.

Q: What parts are included with the long block?

A: This listing is for a long block, which typically includes the block, crankshaft, connecting rods, pistons, camshaft, cylinder heads, valve train, oil pan, and front timing cover. It does NOT include an intake manifold, fuel system components, water pump, accessories (alternator, power steering, A/C compressor), flywheel/flexplate, or engine management system.

Q: Is this engine suitable for daily driving or solely for performance builds?

A: While rated at 400hp, the 5.3L LS platform is inherently durable. With proper supporting components and a good tune, it can certainly be used for reliable daily driving, though its performance camshaft might give it a slightly more aggressive idle and powerband than a stock engine. It excels in both street and performance applications.

Q: What is a “24x reluctor” and why is it important?

A: The 24x reluctor refers to the number of teeth on the crankshaft reluctor wheel, which the crankshaft position sensor reads to determine engine position and speed. It’s crucial for engine management. A 24x reluctor is common on earlier Gen 3 LS engines and is widely supported by many aftermarket ECUs, making it a versatile choice for swaps.

Related products

• REMAN Chevy/GMC 5.3L Engine Long Block (No Core Charge) VIN P, B, T, Z, U
• Remanufactured Engines, Transmissions & Other Powertrain Components
• Goodwrench / GM Service Engines