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

Part Number: 19434650
Your Price: $7,285.07

Suggested Retail:  $9163.61

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

LS364/450 Chevrolet Performance LS-Series Crate Engine 19434650

452hp @ 5,600 rpm

441 lb.-ft. @ 4,800 rpm

The budget performer of the LS family!

Chevrolet Performance engineers have developed the LS364/450 6.0L as a value-driven foundation for builders and enthusiasts looking to give their earlier LS-powered vehicles a high-performance shot in the arm.


Starting with a strong, economical iron cylinder block and durable rotating assembly, it features the high-lift LS6 camshaft and deep-breathing LS3 aluminum cylinder heads. It’s a strong combination that provides exceptional horsepower and a broad torque band. It is also fuel injection-capable, using production-based components offered in this catalog. Additionally, the LS364/450 is designed with the early-style 24X crankshaft and 1X camshaft sensors, enabling easy retro-fit installation in early LS-powered vehicles.


We offer the LS364/450 exclusively as a long-block assembly, without the induction system, ignition system or front-end accessory drive system, allowing builders to transfer components from their early LS-powered vehicle or complete a custom build with the components of their choice. An intake manifold that matches the LS3/L92-style rectangular intake ports is required.

Chevrolet Performance LS364/450 Crate Engine Installation Notes

  • Assembly does not include any electronics
  • Engine is compatible with a vehicle’s existing Gen III controller, but tuning is required
  • Includes LQ9 oil pan
  • Requires intake manifold matched to LS3- or L92-style rectangular intake ports
  • LS3 or L96 production intake manifolds can be used, but require an aftermarket adapter plate for use with early LS three-bolt throttle bodies
  • Not intended for marine applications

Mobil 1 is the recommended engine oil for all Chevrolet Performance Engines

Chevrolet Performance Crate Engines include a 24-month or 50,000-mile/80,000-kilometer limited warranty, whichever comes first. See your GM dealer for details.
Chevrolet Performance does not utilize any used or remanufactured parts in this crate engine, except for the starter, alternator and power steering pump
This part is intended for competition use only. See page 2 of catalog for complete details
TECH SPECS Part Number: 19434650
Engine Type: Performance LQ9 long block
Displacement (cu in): 364 cu in (6.0L)
Bore x Stroke (in): 4.000 x 3.622 in (101.6 x 92 mm)
Block: Cast iron with 6-bolt block, cross-bolted main caps
Crankshaft: Nodular iron
Connecting Rods: Powdered metal
Pistons: Hypereutectic aluminum
Camshaft Type (P/N 12565308): LS6 hydraulic roller
Valve Lift (in): 0.550 intake / 0.550 exhaust
Camshaft Duration (@.050 in): 204º intake / 218º exhaust
Cylinder Heads: LS3 rectangular port; aluminum, as-cast with 68cc chambers
Valve Size (in): 2.165 intake (hollow stem) 1.590 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
Maximum Recommended rpm: 6,800
Reluctor Wheel: 24Xe
Balanced: Internal