The LS4 engine is a 5.3-liter V8 from General Motors’ LS family, designed for front-wheel-drive applications. It combines the reliability and performance of the LS series with a compact layout, producing around 303–310 horsepower, and features technologies like aluminum block construction, coil-on-plug ignition, and a high-flow intake for smooth power delivery in cars like the Chevrolet Impala SS and Pontiac Grand Prix GXP.
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Direct Fit for Your Vehicle
The LS4 engine is a high-performance 5.3-liter V8 produced by General Motors between 2004 and 2008, specifically engineered for front-wheel-drive vehicles. Unlike other LS engines, which are typically used in rear-wheel-drive setups, the LS4 was adapted with a shorter crankshaft and unique oil pan to fit transversely in the engine bay. It delivers 303–310 horsepower and 323 lb-ft of torque, featuring aluminum block and heads, coil-on-plug ignition, and a high-flow intake manifold.
The LS4 powered models like the Chevrolet Impala SS, Pontiac Grand Prix GXP, and Chevrolet Monte Carlo SS, offering a balance of traditional LS V8 performance in a more compact, front-drive configuration. It features an aluminum block and heads, a 10.0:1 compression ratio, and a 96 mm bore with 92 mm stroke. The engine uses overhead valves with 2 valves per cylinder, a hollow steel camshaft, and sequential fuel injection, paired with a 4-speed automatic transmission. Special design elements like a shortened crankshaft, remote water pump, and a baffled oil pan allow it to fit FWD layouts while maintaining performance and reliability.
LS4 fitment is specific to the W-body GM platforms (Grand Prix, Monte Carlo, Impala, LaCrosse) that received the transverse V8 option. The LS4 is not interchangeable with other LS engines without significant modification due to its unique oil pan, accessory drive, and mounting configuration. Our application review confirms the correct LS4 for your vehicle before it ships.
GM W-body V8 owners comparing a used engine, a remanufactured engine, and an OEM engine for the LS4 face a specific challenge — this engine is used in no other application and sourcing requires a supplier who specifically carries these units. A used GM LS4 engine from a verified low-mileage W-body V8 donor gives you the factory transverse V8 as an OEM engine — the unique front-drive oil pan, the factory 303 hp output, the original LS architecture in this uniquely configured assembly. No remanufactured engine from a standard LS application can replicate the LS4’s specific transverse configuration.
Every used GM LS4 engine ships with up to a 90-day warranty and arrives within 2 to 5 business days. Installation is not included. These are genuine GM OEM engines, and we stand behind every unit.
Specifications
Product Type
Engine
Displacement (Engine Size)
5.3L V8
Fuel Type
Gasoline
Availability
In Stock
Shipping
Nationwide Available
Use Case
Ideal for performance builds, swaps, and replacements
Frequently Asked Questions
What car has the LS4 engine?
The LS4 engine was used in a few GM front-wheel-drive performance models, including: – Pontiac Grand Prix GXP – Chevrolet Monte Carlo SS – Chevrolet Impala SS – Buick LaCrosse Super
How much HP does a LS4 have?
The LS4 engine produces 303 horsepower at 5,600 rpm and 323 lb-ft of torque at 4,400 rpm.
Is the LS4 engine good?
Yes, the LS4 engine is reliable and powerful for its size, offering strong performance in front-wheel-drive applications.
What car has the LS4 engine?
The LS4 engine comes in different variants including Chevrolet Impala SS and Monte Carlo SS.
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Shipping Policy
Our shipping policy is flexible, as the shipping charges depend on the location. A few certain remote regions like CO, UT, NY, OR, & CA may have additional shipping charges or delivery fees. However, some circumstances may cause delays, but we always strive to deliver your order as quickly as possible.
Please note that all shipping times are estimates and not guaranteed. We examine all rebuilt and used engines before shipment and aim to provide high-quality used engines and transmissions. Shipping details and fees will be disclosed to consumers before any transactions are made. Our team is operational 24/7, and you can call us at +1-888-799-0188 to place an order.
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