GM EcoTec3 5.3L L83 Gen V Crate Motor / Complete Long Block

Looking to harness the advanced, high-compression engineering of General Motors’ modern Gen V small-block family? This pristine GM EcoTec3 5.3L L83 V8 engine assembly represents an elite balance of raw utility power, modern direct-injection efficiency, and rugged, lightweight construction.

As captured from the rear angle in AllVideo_21768751995345.jpg, this clean, professional-grade crate motor is structurally complete from the oil pan up to the factory composite truck-style intake manifold, making it an excellent dropswap contender for late-model truck/SUV restoration or high-end standalone restomod conversions in the US and Australian markets.

Technical Specifications & Features

• Engine Family: Gen V Small Block (EcoTec3 Architecture)

• Displacement: 5.3 Liters / 325 c.i.d.

• Block & Head Material: Lightweight, high-strength cast aluminum block and matching aluminum cylinder heads for superior thermal management and reduced front-end weight

• Factory Performance Ratings: Rated at a stout 355 Horsepower @ 5,600 RPM and 383 lb-ft of Torque @ 4,100 RPM on standard pump gas (with up to 380 HP and 416 lb-ft of torque utilizing E85 Flex-Fuel capabilities)

• Compression Ratio: High-compression 11.0:1 ratio engineered for optimized thermal efficiency and instant throttle response

• Fuel Delivery: Advanced Direct Fuel Injection (DI) system, which shoots fuel directly into the combustion chamber rather than the intake runner for precision combustion control

• Valvetrain: Overhead valve (OHV) pushrod layout featuring Variable Valve Timing (VVT) and Active Fuel Management (AFM)

Why Choose the Gen V L83 Platform?

• Advanced Direct Injection: By leveraging factory direct-injection technology, the L83 manages a crisp, high-compression power delivery that pulls hard all the way through the rev range while maintaining cleaner emissions and remarkable highway fuel economy.

• Massive Tunability: Don’t let the conservative factory numbers fool you. With simple performance camshaft profiles, high-flow tuning, or forced induction, the structurally robust Gen V block easily pushes past the 500-horsepower threshold.

• Turnkey Baseline Quality: As showcased from the side profile in AllVideo_11768751995362.jpg, the engine arrives outfitted with factory exhaust manifolds, internal heat shielding, plug wires, and individual coil-near-plug ignition units.

Condition Report & Assembly Packaging

Every component on this unit has been thoroughly multi-point inspected and validated for immediate project integration.

As detailed from the front angle in AllVideo_31768751995355.jpg, the assembly comes complete with its factory harmonic balancer, water pump architecture, and an 80mm electronic drive-by-wire (DBW) throttle body safely sealed under a protective protective shipping cap. Vital fluid pathways and line inlets are taped and plugged to ensure absolute contaminant-free delivery during transport.

What’s Included: Aluminum long block assembly, composite high-volume truck intake manifold, full fuel rail with direct-injection lines, electronic throttle body, coil packs with bracketry, valve covers, water pump, factory exhaust manifolds, and a rear flexplate.

We provide secure, heavy-duty palletization with fully insured domestic freight options across the United States, as well as direct containerized ocean freight to all major Australian ports. Contact us with your zip or postal code today for an instant shipping quote!