Chevrolet Performance LS376/525 Crate Engine

$11,564.03 $9,193.40

  • 525 hp @ 6,200 rpm/486 lb.-ft. @ 5,200 rpm
  • ASA Racing-inspired Hot Cam
  • Higher-rate Valve Springs
  • Most Powerful Naturally-Aspirated LS
PROMO AVAILABLE: 1 Free Case of Mobil 1 Oil with Purchase of Chevrolet Performance Crate Engine or 2 Free Cases with the Purchase of a Connect & Cruise System. See 'Promo' tab below for details.

Have your engine dyno tested by one of our professional engine builders to ensure everything is properly broken in. We can dyno your engine with your components to make sure everything is working harmoniously before shipping you the whole assembly drained and ready to install.

SKU: 19419866 Category: Tag:

LS376/525 Crate Engine

P/N 19419866

525 hp @ 6,200 rpm / 486 lb.-ft. @ 5,200 rpm

LS376/525 Tech Specs:

Part Number: 19419866
Engine Type: LS-Series Gen IV Small-Block 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 12623967): Cast aluminum with 6-bolt, cross-bolted main caps
Crankshaft (P/N 12685659): Nodular iron
Connecting Rods (P/N 12607475): Powdered metal
Pistons (P/N 19207287): Hypereutectic aluminum
Camshaft Type (P/N 88958770): Hydraulic roller
Valve Lift (in): .525 intake / .525 exhaust
Camshaft Duration (@.050 in): 226° intake / 236° exhaust
Cylinder Heads (P/N 12629063): Aluminum L92-style port; as cast with 68cc chambers
Valve Size (in): 2.165 intake / 1.590 exhaust
Compression ratio: 10.7:1
Rocker Arms (P/N 12669995 int): Investment cast, roll trunnion
Rocker Arms (P/N 12681275 exh): Investment cast, roll trunnion
Rocker Arm Ratio: 1.7:1
Recommended Fuel: Premium pump
Maximum Recommended rpm: 6,600
Reluctor Wheel: 58x
Balanced: Internal

Recommended Transmission: SuperMatic™ 4L70-E Four-Speed Automatic P/N 19299055

Installation Notes:
– Assembly does not include any electronics
– Use LS376/525 Engine Controller Kit for engine operation P/N 19259261
– Includes Chevy SS wet sump oil pan
– Intended for pre-1976 street vehicles or any off-road vehicle
– Not intended for marine applications
– Front-end accessory drive kits are available in several configurations


This part replaces old P/N 19301360 & 19369338 & 19370413

Weight 415 lbs


19301360, 19369338, 19370413

LS376/525 Crate Engine

19419866 Chevrolet Engine

Our Most Powerful Naturally Aspirated 6.2L!

With Chevrolet Performance’s aggressive ASA camshaft ? developed for the high-rpm world of circle-track racing ? installed in the LS3 6.2L engine, it comes alive with 525 uncompromising horsepower. That makes it the most powerful naturally aspirated 6.2L street engine in our portfolio ? and one that has an edge to it. You’ll notice it in the idle quality and you’ll feel it when the revs quickly climb.

The ASA camshaft is a hydraulic roller with .525-inch lift on both sides, along with 226 degrees duration on the intake side and 236 degrees on the exhaust side. Coupled with a tight, 110-degree lobe separation angle, it helps the engine deliver excellent throttle response and breathe exceptionally well at high rpm. And for durability, we complement the cam with higher-rate valve springs.

You’ll need tuning to make the most of the engine in a late-model GM vehicle. If you plan to use the engine in a vintage car, you’ll need controller kit P/N 19354332, which includes the throttle pedal to match its electronically controlled throttle body.

This part replaces old P/N 19301360 & 19369338 & 19370413

Click here to download installation information

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

Click here for more detailed warranty information.

This product qualifies for a $250 Rebate from Chevrolet Performance.

To receive the rebate:

  1. Purchase a select Chevrolet Performance Crate Engine between 10/1/2020 and 12/31/2020
  2. Complete all information requested on this form and mail it by January 31st, 2021, OR
  3. Submit your rebate online at before the same deadline

See rebate form for more details.

NOTE: Please allow up to 6-8 weeks for rebate processing.

This product qualifies for Free Mobil 1 Oil!

November 1, 2020 through February 28, 2021 receive a Free case of Mobil 1 Oil with the purchase of a Chevrolet Performance Crate Engine and receive two Free Cases of Mobil 1 Oil with the purchase of a Connect & Cruise Package.


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