The Chevrolet Performance LS364/450 (Part #19434650) is the ultimate “best-of-both-worlds” crate engine for LS enthusiasts. By combining the bulletproof durability of a Gen III iron block with the high-flowing technology of Gen IV LS3 rectangular-port cylinder heads, Chevy has created a 450-horsepower masterpiece that is both affordable and incredibly tough.
Whether you are looking for a C5 Corvette engine upgrade, a high-output Silverado LS swap, or a powerful heart for your F-Body Camaro, the LS364/450 offers modern LS3 power with the ease of a classic 24X reluctor wheel setup.
LS364/450 Performance Specs & Technical Data
- Horsepower: 452 hp @ 5,600 rpm
- Torque: 441 lb-ft @ 4,800 rpm
- Displacement: 6.0L (364 cubic inches)
- Compression Ratio: 10.3:1
- Block: Cast iron Gen III (6-bolt, cross-bolted main caps)
- Cylinder Heads: LS3-style aluminum (Rectangular port)
- Camshaft: LS6 hydraulic roller (0.550″ intake / 0.550″ exhaust lift)
- Reluctor Wheel: 24X (Compatible with 1997–2006 factory ECUs)
Why Choose the LS364/450 Over a Standard LS3?
The LS364/450 crate engine is specifically engineered for owners of early LS-powered vehicles (1997–2006). Unlike a standard LS3, which requires a 58X conversion box or a new computer, the LS364/450 is a direct plug-and-play for 24X systems.
Key Benefits:
- Cost-Effective Power: Get near-LS3 performance at a significantly lower price point.
- Iron Block Strength: The cast-iron block provides superior thermal stability and strength for high-stress applications or future boost.
- Advanced Airflow: The inclusion of LS3 rectangular-port heads means this engine breathes better than any factory 6.0L truck engine (LQ4/LQ9).
Installation & Compatibility Notes
This engine is sold as a Long Block, allowing you to transfer your existing accessories or customize your induction system.
- Intake Manifold: Requires an LS3-style rectangular port intake (e.g., LS3 factory, Holley Sniper, or Edelbrock Victor Jr.).
- Fueling: Works seamlessly with EFI or carbureted setups.
- Retrofit Ready: Perfect for 1998–2002 Camaros, 1997–2004 Corvettes, and 1999–2006 GM trucks.
Build Your Dream LS Swap Today
Stop searching through junkyards for a high-mileage 6.0L. The Chevrolet Performance LS364/450 offers brand-new reliability, a factory warranty, and 450+ horsepower right out of the box.
The Chevrolet Performance LS364/450 is widely considered a “cheat code” for owners of early LS vehicles. It provides a bridge between Gen III reliability and Gen IV high-flow technology, specifically designed to be a direct retrofit for 24X reluctor wheel systems found in 1997–2006 models.
Scoggin Dickey Parts Center +2
LS364/450 vs. Standard LS3 Crate Engine
The primary difference lies in the block material and electronic compatibility. While the LS3 uses a lighter aluminum block, the LS364/450 uses a heavy-duty iron block paired with the same high-flowing LS3 heads.
GM Special Vehicles +2
| Feature | LS364/450 (Part #19434650) | Standard LS3 (Part #19301326) |
|---|---|---|
| Horsepower | 452 hp @ 5,600 rpm | 430 hp @ 5,900 rpm |
| Torque | 441 lb-ft @ 4,800 rpm | 425 lb-ft @ 4,600 rpm |
| Block Material | Cast Iron (Gen III LQ9-based) | Cast Aluminum (Gen IV) |
| Displacement | 6.0L (364 cu in) | 6.2L (376 cu in) |
| Reluctor Wheel | 24X (Direct for ’97–’06 vehicles) | 58X (Requires conversion for older cars) |
| Cylinder Heads | Aluminum LS3 Rectangular Port | Aluminum L92-style Rectangular Port |
| Camshaft | LS6 Hydraulic Roller (0.550″/0.550″ lift) | Hydraulic Roller (0.551″/0.522″ lift) |
| Compression Ratio | 10.3:1 | 10.7:1 |
| Sale Price (est.) | ~~~$9,324.42~~~ $7,412.92 | Varies by package |
Essential Installation Parts
Since the LS364/450 is sold as a long block, you will need these specific components to complete the build:
- Intake Manifold: You must use an LS3-style rectangular port intake. Options include the factory LS3 manifold, the Holley Hi-Ram for hot rods, or the Edelbrock Victor Jr. for carbureted setups.
- Oil Pan: It comes with an LQ9 truck oil pan. For most car swaps (like C5 Corvette or F-Body), you will likely need to swap this for a low-profile Muscle Car Oil Pan Kit.
- Tuning: While it physically plugs into Gen III controllers, a custom tune is required to account for the increased airflow and LS6 camshaft
