LS364/450HP – Gen III 6.0L 24x Long Block

BUDGET-FRIENDLY POWERHOUSE: THE BEST OF THE LS ENGINE FAMILY

Chevrolet Performance engineers created the LS364/450 as an affordable yet powerful solution for hot rod builders and LS enthusiasts who want to boost the performance of their early LS-powered rides.

Built on a sturdy, cost-effective iron cylinder block with a durable rotating assembly, the 6.0L LS engine combines a high-lift LS6 camshaft with deep-breathing LS3 aluminum cylinder heads—a proven setup that delivers outstanding horsepower and a wide torque curve. The engine is fuel injection–ready, compatible with production-based components available in this catalog.

Designed with the early-style 24X crankshaft and 1X camshaft sensors, the LS364/450 makes retrofitting simpler for earlier LS-powered vehicles such as 1998–2002 Camaros, C5 Corvettes, 1999–2006 full-size trucks and SUVs, and other LS platforms.

Chevrolet offers the LS364/450 exclusively as a long-block assembly, without the induction, ignition, or front-end accessory drive systems. This gives builders the flexibility to reuse components from their existing LS setup or create a custom configuration using their preferred parts. Note that an intake manifold compatible with LS3/L92-style rectangular intake ports is required.

No matter what vehicle you install it in, the LS364/450 delivers a winning balance of power, durability, and value, taking your project to the next level of performance.

TECH SPECS

Part Number: 19370163
Engine Type: Performance LQ9 long block
Displacement: 364 cu in (6.0L)
Bore x Stroke: 4.000 x 3.622 in (101.6 x 92 mm)
Block: Cast iron, 6-bolt with cross-bolted main caps
Crankshaft: Nodular iron
Connecting Rods: Powdered metal
Pistons: Hypereutectic aluminum
Camshaft Type (P/N 12565308): LS6 hydraulic roller
Valve Lift: 0.550 in (intake/exhaust)
Camshaft Duration (@.050 in): 204º intake / 218º exhaust
Cylinder Heads: LS3 rectangular port aluminum, as-cast, 68cc chambers
Valve Size: 2.165 in intake (hollow stem) / 1.590 in exhaust (solid stem)
Compression Ratio: 10.3:1 nominal
Rocker Arms: Investment-cast, roller bearing trunnion
Rocker Arm Ratio: 1.7:1
Recommended Fuel: Premium pump
Max Recommended RPM: 6,800
Reluctor Wheel: 24X
Balanced: Internal

INSTALLATION NOTES

• Assembly does not include electronics

• Compatible with Gen III controllers (tuning required)

• Includes LQ9 oil pan

• Requires intake manifold matched to LS3/L92-style rectangular ports

• LS3 or L96 intake manifolds may be used with an aftermarket adapter plate for early LS three-bolt throttle bodies

• Not designed for marine applications