LS Gen III 6.0L Crate Engine Kit, 364HP/450TQ, Carbon Fiber

Transform your vehicle with the ATK-tuned GM 5.3L LH6/LC9 engine, a limited-edition (only 50 units) all-aluminum powerhouse crafted for 2005-2009 GM trucks and SUVs. Boasting 475 HP and 430 lb-ft of torque, this non-DOD/AFM engine features a high-performance COMP Cams camshaft (223/231 @50, .610/.617 lift, 112LSA) and robust cylinder sleeves for superior durability. Paired with the innovative Carbon LS1/LS2/LS6 pTR Intake Manifold, offering tunable 6.5–9” velocity stacks and a carbon fiber plenum for minimal heat soak, this setup maximizes power across the RPM range. Enhanced with Speedway Motors’ aluminum timing cover, two-piece valve covers for concealed LS coils, a 92mm CNC-machined throttle body, V-band cast iron exhaust manifolds for 2002–2012 LS engines, and a sleek All American Billet Silverline Series serpentine kit, this package delivers exceptional value for high-performance LS upgrades or new builds. Designed with a Gen III 24X crankshaft and 1X camshaft trigger system, it’s an easy retrofit for 1997–2006 LS-equipped vehicles, reusing existing sensors, exhausts, and mounts, though a Gen IV rectangular port intake manifold is required. Dyno figures based on 750CFM carburetor, Vic Jr. intake, and 1-7/8” headers; EFI systems enhance power output.

Key Features:

• Unmatched Performance: Delivers 475 HP and a broad 430 lb-ft torque band, ideal for street, strip, or custom builds.

• Seamless LS Swap Integration: Gen III 24X/1X trigger system ensures easy retrofitting into 1997–2006 LS vehicles, reusing components.

• Advanced Intake Design: Carbon LS pTR manifold with modular runners optimizes power for high-RPM or mid-range torque applications.

• Premium Aesthetics & Durability: Features Speedway Motors timing cover, two-piece valve covers, and Silverline serpentine kit for a polished, aggressive look.

• Flexible Induction Options: Fuel injection capable, supports stock EFI, aftermarket intakes, or transferred components for custom setups.

Engine Specifications:

• HP/TQ: 475 HP / 430 lb-ft

• Block: New GM 5.3L Aluminum, 3.780” bore x 3.622” stroke, 323 cu.in

• Camshaft: COMP Cams Hyd. roller (54-457-11)

• Heads: OE 799/243 aluminum (Gen IV rectangular port), 65cc, 2.000”/1.575” valves

• Compression: 9.9:1 with hypereutectic flat-top pistons

Recommended Components:

• Fuel: 91 Octane, OE EFI or Gen IV 6.0-6.2L rectangular port intake manifold

• Oil: 5W30

• Headers: 1-7/8” (application-dependent)

• Stall Converter: 2200+ RPM

• Timing: Factory specs via PCM tune (chassis dyno tune required)

Notes: Requires chassis dyno tune and AFM/DOD deactivation in ECM for swaps. Power varies with induction system. Includes valve and timing covers; no oil pan/pump. Gen IV rectangular port intake manifold (e.g., 6.0-6.2L Gen IV truck/car) required.

Disclaimer: Power figures depend on user-selected components. Verify component compatibility; vehicle modifications may be required. ATK reserves the right to substitute parts if needed.

• Part Number: 19370163
• 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): 204° intake / 218° 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: 24X
• Balanced: Internal