LS Crate Engine – Chevrolet Performance LS376/480 Long Block Engine


  • 495 hp @ 5,750 rpm/475 lb.-ft. @ 4,500 RPM


Shipping is free, but there is a delivery fee for residential addresses.

LS376/480 Long Block

The LS376/480 Long Block is the powerful LS3 6.2L power coupled with:

  • L92-style rectangular ports
  • High Lift Camshaft (.525” intake/.525 exhaust)

These upgrades help to make the LS376/480 Long Block a strong engine offering plenty of power over the standard LS3:

  • LS376/480 HP Long Block – 495 HP @ 5,750 RPM / 473lb.-ft @ 4,500 RPM
  • LS3 – 436HP @ 5,900 RPM / 428 lb-ft. @ 4,600 RPM

Learn more about this crate engine with a recent blog on this Silverado. The LS376/480 crate motor offers unique upgrades to give your hot rod the power it needs. With more than a horsepower per pound, this LS376/480 is one of Chevy’s most exciting crate offerings.

What’s Included

  • Fully Assembled GM Long Block
  • Oil Pump, Pickup, and Camaro Oil Pan

Important Notes

  • Will require L92 style intake manifold, fuel rails, injectors, exhaust manifolds, throttle body, EFI controller, and accessory drive.
  • Coolant Crossover, Oil Dipstick, and Tube are not included.

If you need help with your new crate engine check out the Karls Kustoms Crate Program.

Replaces P/N 19420384, 19432424, and 19434646

Weight 486 lbs

Manufacturer Part Number



19420384, 19432424

LS376/480 Long Block

495 hp @ 5750RPM / 473 lb.-ft. @ 4500RPM

  • Displacement: 376 CID, 6.2L
  • Bore x Stroke: 4.060” x 3.620”
  • Compression Ratio: 10.7:1
  • Recommended Fuel: 92 Octane
  • Block: Cast Aluminum with 6 bolt, cross-bolted main caps
  • Crankshaft: Nodular Iron
  • Connecting Rods: Powdered Metal Steel
  • Pistons: Hypereutectic Aluminum
  • Camshaft: Steel Hydraulic Roller Tappet
  • Cam Lift: .525” Intake / .525” exhaust
  • Cam Duration @ .050”: 219 deg. Intake / 228 deg. Exhaust
  • Lobe Separation: 112 Degree
  • Cylinder Heads: Aluminum L92 style ports
  • Combustion Chamber: 68cc
  • Valves: 2.165” Intake/ 1.590” Exhaust
  • Rocker Arms: Cast Roller Trunnion, 1.7:1 Ratio
  • Balance: Internal
  • Reluctor: 58X
  • Maximum GM Recommended RPM: 6600
  • GM Recommended Torque Converter Stall: 2400-2800

Chevrolet Performance Crate Engines carry a 24 Month or 50,000 mile warranty (whichever comes first) when installed by a qualified independent service center. Chevrolet Performance Crate Engines also come with a 30 day start up warranty (parts only).

There are some additional limitations on the warranty – please see the official GM warranty documentation for more information.


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Prop65WARNING: These auto parts can expose you to chemicals including phthalates and lead. Installing or using these parts can expose you to other parts containing these chemicals and to engine exhaust, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to

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