LS3

Our engineers never stop tinkering. When they took a production LS3 6.2L (376 cubic inches) engine and swapped the stock camshaft for the racing-inspired LS Hot Cam (P/N 88958753), the result was a stunning 495 horsepower and 473 lb-ft of torque.

We wasted no time in adding that terrific combination – dubbed LS376/480 – to our crate engine portfolio. The key to the power boost is the Hot Cam’s 0.525-inch lift on both the intake and exhaust sides, along with 219-degree/228-degree duration specs. That’s less lift on the intake side than the stock LS3 cam, but considerably more duration, allowing the valves to stay open a little longer to draw in more air from the rectangular-port L92-style heads.

Use the LS376/480 with a controller kit (P/N 1925267), which includes a special pedal for use with the engine’s electronically controlled throttle.

Tech Specs

• 495 HP @6200 RPM
• 473 LB-FT Torque
• Engine Type: LS-Series Gen-IV Small-Block V-8
• Displacement (cu. in.): 376 (6.2L)
• Bore x Stroke (in.): 4.065 x 3.622 (103.25 x 92 mm)
• Block (P/N 12623967): Cast-aluminum with six-bolt, cross-bolted main caps
• Crankshaft (P/N 12597569): Nodular iron
• Connecting Rods (P/N 12607475): Powdered metal
• Pistons (P/N 19207287): Hypereutectic aluminum
• Camshaft Type (P/N 88958753): Hydraulic roller
• Valve Lift (in.): .525 intake / .525 exhaust
• Camshaft Duration (@0.050 in.): 219° intake / 228° exhaust
• Cylinder Heads (P/N 12620544): Aluminum L92-style port; “as cast” with 68-cc chambers
• Valve Size (in.): 2.165 intake / 1.590 exhaust
• Compression Ratio: 10.7:1
• Rocker Arms (P/N 12569167 int): Investment-cast, roller trunnion
• Rocker Arms (P/N 10214664 exh): Investment-cast, roller trunnion
• Rocker Arm Ratio: 1.7:1
• Recommended Fuel: 92 octane
• Maximum Recommended rpm: 6600
• Reluctor Wheel: 58X
• Balanced: Internal