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LT4 S/C 6.2L Wet Sump Chevrolet Performance Crate Engine

Brand: Chevrolet Performance

Part Number: 19368622



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LT4 S/C 6.2L Crate Engine

19368622 Chevrolet Crate Motor

Wet Sump

As the heart of the C7 Corvette Z06, the Supercharged LT4 6.2L engine is the most powerful engine ever offered in a regular-production Chevrolet. It features a more-efficient, more-compact 1.7L Eaton R1740 TVS supercharger, which spins at up to 20,000 rpm. That’s enough to generate more than 9 pounds of boost and help produce 640 hp and 630 lb.-ft. of torque.

This Chevrolet Performance LT4 crate motor is based on the same GM Gen V architecture as the LT1 engine, with several unique features designed to support its higher output and the greater cylinder pressures created by forced induction. They include Rotocast A356T6 aluminum cylinder heads that are stronger and handle heat better than conventional castings, lightweight titanium intake valves and stronger forged aluminum pistons.

LT4 S/C 6.2L Wet Sump Crate Motor

P/N 19368622

640 hp @ 6,000 rpm / 630 lb.-ft. @ 4,600 rpm


LT4 6.2L Tech Specs:

Part Number: 19355404 (wet sump)
Engine Type: Gen V V-8
Displacement (cu in): 376 cu in 6.2L
Bore x Stroke (in): 4.065 x 3.622 (103.25 x 92mm)
Block (P/N 12619171): Cast-aluminum with 6-bolt, cross-bolted main caps
Crankshaft: Forged Steel
Connecting Rods: Forged powdered-metal steel
Pistons: Forged aluminum
Camshaft Type: Hydraulic roller
Valve Lift (in): 0.492" intake / 0.551" exhaust
Camshaft Duration (@0.050 in): 189° intake / 223° exhaust
Cylinder Heads: A356 T6 Rotocast aluminum; as cast with 65.5cc chambers
Valve Size (in): 2.130" intake / 1.590" exhaust
Compression ratio: 10:1
Rocker Arms (P/N 12619829): Investment-cast, roller bearing trunnion
Rocker Arm Ratio: 1.81:1
Recommended Fuel: Premium Pump
Maximum Recommended RPM: 6,600
Reluctor Wheel: 58x
Balanced: Internal


Installation Notes:

  • Engines shipped with high-pressure direct-injection fuel pump installed
  • Comes with a Corvette oil pan - Use oil hose adaptors P/N 25534412 to adapt AN-12 fittings
  • Assembly does not include electronics
  • Use LT4 Controller Kit, P/N 19355174 for engine operation with 8L90-E 8-speed automatic transmission or P/N 19366789 for 4L75-E 4-speed automatic AND T56 6-speed manual transmissions - Kits include electronic throttle pedal, which is required for throttle input to the ECU
  • Flywheel included
  • Intended for pre-1976 street vehicles or off-highway vehicles only
  • Not intended for marine applications
  • Front-End Accessory Drive Kit, P/N 19332590, can be ordered separately
  • 8-bolt crankshaft flange
  • Shipped with 14" flexplate
  • Replaces P/N 19332621 and supersedes P/N 19355404


LT4 - Supercharged Power from the C7 Corvette Z06!

LT4 S/C 6.2L Wet Sump Crate Engine

Click here to download installation information.

LT4 S/C 6.2L Wet Sump Crate Engine

Chevrolet Performance Crate Engines include a 24-month or 50,000-mile (80,000 kilometer) limited warranty.

Click here for more detailed warranty information.