LS4 Engine Price range: $1,500.00 through $5,000.00Select options
LS4 Engine
The LS4 Engine is a unique member of General Motors’ Gen IV small-block V8 family, distinguished as the only LS engine engineered specifically for transverse, front-wheel-drive (FWD) applications. Produced from 2005 to 2009, it powered performance-oriented FWD models such as the Chevrolet Impala SS, Pontiac Grand Prix GXP, and Buick LaCrosse Super. With a 5.3-liter (325-cubic-inch) all-aluminum construction, the LS4 delivered around 303 horsepower and 323 lb-ft of torque, supported by a 10.0:1 compression ratio. To fit its unconventional FWD layout, the engine incorporated several exclusive design changes, including a shortened crankshaft, a vehicle-specific accessory drive, a reversed intake manifold, and a starter motor mounted to the transmission bellhousing instead of the engine block.
In Stock
$1,500.00 – $5,000.00Price range: $1,500.00 through $5,000.00
The prices are exclusive of taxes and shipping. The price may vary depending upon the miles and year of manufacturing.
SKU: GM-LS4001
Category: Used Engine
Tags: cars with LS4 engine, LS4 crate engine, LS4 engine, LS4 engine for sale, LS4 engine horsepower, LS4 engine price, LS4 engine specs, LS4 engine upgrades
Brand: General Motors
Additional Information
| Brand | General Motors |
|---|---|
| Conditions | Remanufactured, Used |
| Miles | 70000-130000 |
| Year Compatibility | 2005-2009 |
| Verified | Tried & Tested |
| Warranty | Up to 3 Months |
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Specification
LS4 Engine also featured Active Fuel Management (AFM), which deactivated cylinders during light-load driving to enhance fuel efficiency, and used cathedral-port cylinder heads derived from the high-performance LS6, blending compact packaging with proven LS-series performance. While the LS4 shares the same displacement as the popular5.3 LS engine, its transverse FWD configuration makes it mechanically distinct and non-interchangeable with traditional RWD LS platforms.
Compatable Models
Pontiac Grand Prix GXP
The Pontiac Grand Prix GXP was the flagship LS4 application, pairing the 5.3L V8 with a performance-tuned suspension and aggressive styling. It delivered strong straight-line acceleration and V8 character in a front-wheel-drive sedan, making it one of Pontiac’s most powerful production cars of its era.
Chevrolet Monte Carlo SS
In the Monte Carlo SS, the LS4 brought V8 muscle to a classic two-door coupe platform. The engine provided smooth yet forceful power delivery, giving the Monte Carlo SS a blend of comfort, highway performance, and unmistakable LS-series sound in a rare FWD V8 setup.
Chevrolet Impala SS
The Chevrolet Impala SS used the LS4 to transform the full-size sedan into a sleeper performance car. With over 300 horsepower on tap, it offered impressive acceleration and passing power while retaining everyday drivability and interior space. For those seeking alternatives, the LS3 engine offers even more power in a rear-wheel-drive configuration for performance builds and swaps.
Buick LaCrosse Super
The Buick LaCrosse Super combined the LS4’s V8 performance with luxury-focused refinement. Tuned for smoothness rather than outright aggression, it delivered effortless power, quiet operation, and premium comfort, making it one of Buick’s most powerful front-wheel-drive vehicles ever produced.
Frequently Asked Questions
What vehicles came with the LS4 engine?
The LS4 engine was installed in 2006-2009 Chevrolet Impala SS, 2006-2008 Chevrolet Monte Carlo SS, 2005-2008 Pontiac Grand Prix GXP, and 2008-2009 Buick LaCrosse Super.
How much horsepower does the LS4 engine make?
The LS4 produces approximately 303 horsepower at 5,600 RPM and 323 lb-ft of torque at 4,400 RPM.
Can you swap an LS4 engine into other vehicles?
LS4 swaps are challenging due to its transverse FWD-specific design with shortened crankshaft, unique accessory drive, and bellhousing-mounted starter. It’s primarily suitable for FWD GM platforms. For traditional RWD swaps, the 5.3 LS engine or LS3 engine are better choices.
What is Active Fuel Management (AFM) on the LS4?
AFM (Active Fuel Management) is a cylinder deactivation system that shuts down four cylinders during light-load conditions to improve fuel economy.
Is the LS4 engine reliable?
The LS4 is generally reliable, sharing proven LS-series architecture. Main concerns include AFM lifter failure at high mileage (100,000+ miles) and unique FWD-specific parts availability.
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