The LS4 was used in GM cars between 2005-09. It is unique because it was the only LS engine used in FWD vehicles. To make this engine work, GM made several modifications to the engine: The engine was mounted in a transverse position, using unique motor mounts.

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The LS4 is very unique in the LS family of engines. It was only used in front wheel drive (FWD) cars. On a stock engine, the following upgrades can improve performance and fuel economy: A Cold Air Intake Kit; An Aftermarket Exhaust; A Computer Programmer; Engineers had to make a lot of compromises to get an LS engine to fit sideways in a FWD ...

Chevrolet's 3rd and 4th generation small block engines are generally known by their RPO code. You can determine the RPO code if you have the Vehicle Identification Number (VIN) from the original vehicle.

Displacement Markings: Block Material: Timing Cover: Intake Manifold : Engine/Series: 4.8/5.3L: Cast Iron: Plain: Truck: LR4, LM7, or L59

The purpose of Active Fuel Management (AFM) is to improve gas mileage. It is also known as Displacement on Demand (DOD) or cylinder deactivation.

Any Chevy LS engine, EXCEPT the LS4 and some early LQ4 and LR4 engines. The LS4 was used in FWD cars and uses a metric, 60 degree, Chevrolet V6 bellhousing. For details about the LQ4 and LR4 engines, see Mating a GM Automatic Transmission to an Early LQ4 or LR4. Transmissions; Powerglide; TH350; TH400; 200R4; 700R4; 4L60; Solution

For all Gen. 3 and 4 Chevy small block engines with the same Displacement, the Bore Diameter and Stroke Length are the same.

LS Cylinder Head Torque Specs: Engine Family: Bolt Size: First Pass: Second Pass: Final Pass: Gen. 3 (LS1, LS6, etc.) M11 x 155.5mm

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