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Notes: This engine is compatible as a replacement for 2001-2007 Chevy 4.8L, 5.3L, and 6.0L engines with the appropriate upgrades, including an LS3-style intake. ECM tuning and injector upgrades are required to ensure proper function and prevent potential engine damage. Power output will vary depending on the induction system used (Carb/EFI and manifold design).
Engine Specifications:
• HP: 535
• TQ: 485
• Block: OE LQ4/LQ9 6.0L Iron
• Bore/Stroke: 4.030 x 3.622
• Displacement (cu.in): 371ci
• Crankshaft: OE GM 24 tooth reluctor wheel
• Rods: OE powder metal
• Pistons: Hypereutectic 10.1 compression
• Rings: Moly
• Camshaft: Hyd. Roller
• Cam Specs: Custom performance grind
• Timing Chain: OE single roller
• Cylinder Heads: ATK LS3 rectangle port aluminum 69cc/255cc 2.160”in/1.600”ex
• Rocker Arms: OE 1.7 ratio with trunnion upgrade
• Oil Pump: Melling M295
Recommended Components:
• Flexplate/Flywheel: Stock internally balanced
• Balancer: Stock internally balanced/per application
• Intake Manifold: Stock rectangular port/LS3 style EFI intake or aftermarket
• Water Pump: Per application
• Fuel Pump: Stock electric
• Fuel Injectors: 42lb injectors
• Spark Plugs: Autolite #104
• Spark Plug Wires: Factory or Aftermarket
Engine Info:
• Oil: Conventional / Non Synthetic 10W30
• Oil Filter: Wix or K&N
• Timing: Set to factory specifications via PCM module (ECM TUNING REQUIRED).
• Spark Plug Gap: .040”
• Firing Order: 18726543
• Octane: 91+
• Stall Converter: 2500+
• Exhaust: 1 5/8+ Headers
