Chevrolet LS3 Crate Motor Gen-IV Small-Block V8 430 HP for Sale | 6.2L (376 cu in)

About the Chevrolet LS3 Crate Motor

The LS3 crate motor represents the pinnacle of high-performance engineering from Chevrolet’s LS-Series Gen-IV small-block V8 program. Known for its versatility and power, this Gen-IV small-block V8 engine delivers exceptional performance for a variety of automotive applications. Whether you’re upgrading a classic muscle car, restoring a vintage vehicle, building a restomod, doing an LS swap into a project chassis, or boosting the power of your truck, the LS3 crate motor is engineered to meet your needs with precision and power.

Why the LS3 Became the LS Swap Standard

The LS3 became the most popular LS swap engine of all time for several reasons:

• Factory 430 hp output is exceptional for a naturally aspirated 6.2L pushrod V8

• Rectangular port aluminum heads flow significantly better than earlier LS1 / LS2 cathedral port heads, supporting higher peak horsepower

• Modern fuel injection with sequential multi-port and refined ECU calibration

• Compact V8 architecture fits in nearly any engine bay (small block dimensions)

• Lightweight aluminum block and heads keep the package weight reasonable

• Extensive aftermarket support with cams, headers, intake manifolds, supercharger kits, turbo kits, and tuning options widely available

• Direct ECU compatibility with E38 ECU (factory Camaro SS) and aftermarket ECU options

• Drop-in fitment into Camaro F-body, GTO, G8, and many swap chassis with appropriate motor mounts

Performance Features for the LS3 Crate Motor

The LS3 crate motor excels with a maximum horsepower of 426 to 436 hp and peak torque of 420 to 428 ft/lbs. Its high-revving capabilities and advanced engineered components, including an aggressive factory camshaft and efficient valve train, ensure superior performance at high RPMs. The LS3 crate motor‘s robust design and powerful output make it an excellent choice for both racing and everyday driving.

Compatibility

This LS3 crate motor is perfect for a range of vehicles, particularly muscle cars and trucks. It is the standard engine for the fifth-generation Camaro SS (2010 to 2015) and the C6 Corvette (2008 to 2013). Its versatility and ease of integration make the LS3 crate motor a favored choice for automotive enthusiasts and the most popular LS swap engine of all time.

Common LS3 Swap Applications

• Classic muscle car restomods: 1967-1972 Camaro, 1968-1972 Chevelle, 1970-1972 Monte Carlo, 1968-1969 Nova, 1955-1957 Bel Air, 1969-1970 Mustang, etc.

• Square-body Chevy / GMC truck restomods: 1973-1987 C/K series with LS3 swap is one of the most popular truck builds

• Project car builds: Modern hot rods, kit cars, custom builds requiring high-output naturally aspirated power

• C6 Corvette repower: Original LS3-powered Corvette needing replacement

• Camaro SS repower: 5th-gen Camaro SS needing replacement after high-mileage retirement of original engine

Components Included

The LS3 crate motor package comes complete and ready for installation, including:

• Camaro F-body oil pan (compatible with most swap applications, can be replaced with truck oil pan or aftermarket low-profile pan as needed)

• Intake manifold assembly with fuel injectors

• Complete ignition system (coil packs, spark plug wires)

• Standard front-end accessory drive (FEAD) kit (alternator, power steering, water pump, idler pulleys, belt)

• Detailed installation instructions and necessary hardware

Installation and Maintenance

Installing the LS3 crate motor is straightforward with the provided comprehensive instructions. To ensure the longevity and optimal performance of your LS3 crate motor, follow the recommended maintenance schedule which includes regular oil changes (5,000 miles maximum, premium 5W-30 synthetic), coolant checks, and periodic inspection of components. In case of any installation issues, the detailed troubleshooting guide will be highly beneficial.

Maintenance schedule essentials:

• Oil and filter: Every 5,000 miles, premium full synthetic 5W-30 (Dexos1 spec)

• Spark plugs: Every 100,000 miles (factory iridium plugs)

• Coolant: Every 5 years or 100,000 miles

• Air filter: Inspect at every oil change, replace as needed

• Transmission service: Per transmission manufacturer specs (varies by application)

Performance Upgrades and Modifications

Boost the capabilities of your LS3 crate motor with potential upgrades like aggressive camshafts (LS7 cam, custom cams), upgraded valve springs, ported heads, custom tuning, headers, and forced induction (turbo or supercharger). The LS3 platform supports a wide range of performance modifications:

• Naturally aspirated: Cam, springs, headers, intake, tune typically yields 480 to 520 hp

• Supercharger: Magnuson, Whipple, Procharger, Vortech kits typically yield 550 to 750 hp

• Turbocharger: Single or twin turbo setups can produce 700 to 1,200+ hp depending on internal preparation

These modifications can enhance performance further while maintaining the reliability that GM LS engines are famous for. Note that modifications might affect warranty terms.

Comparison with Other Engines

When comparing the LS3 crate motor to other crate engines like the LS376/525 (essentially an LS3 with hot cam and uprated heads producing 525 hp), it’s evident that the LS3 balances cost and performance effectively. While the LS376/525 offers more horsepower out of the box, the LS3 retains a competitive edge with its robustness, drivability, and cost efficiency, especially for owners planning to add cam, headers, or forced induction in stages.

LS3 vs Other LS Variants:

For more information on the LS3 crate motor, download official documentation and manuals from Chevrolet’s website or join forums and communities dedicated to LS-series enthusiasts. Learn from detailed articles and blog posts about performance tuning and maintenance tips.

Why a Crate LS3 vs a Used Pull?

A crate LS3 is the right choice for buyers who:

• Want a complete package ready to install (oil pan, intake, injectors, ignition, FEAD)

• Are doing a swap into a chassis where stripping a donor isn’t practical

• Want documented hours / mileage history

• Need the package convenience of one purchase rather than sourcing components separately

• Want clean visual aesthetics (a fresh-looking engine in the bay)

A used LS3 pull from a Camaro SS or C6 Corvette donor is the right choice for buyers who:

• Are budget-constrained and willing to inspect / refresh as needed

• Already have the supporting components (intake, injectors, ignition)

• Don’t need the convenience of a complete package

• Are comfortable assessing donor mileage and history

FAQs

What’s the difference between LS3 and LS376/525?