Eaton Performance Parts

Eaton Performance Parts

Eaton Performance is best known in the automotive aftermarket for its Eaton M90, M112, and M122 positive displacement supercharger roots-type blowers that power factory applications including the Ford Lightning, Mustang Cobra, Pontiac GTO, and Cadillac CTS-V as original equipment, which means the same engineering behind factory horsepower numbers reaches the enthusiast market directly through Eaton's performance division. The brand also produces Detroit Locker and Truetrac limited-slip and locking differentials that are among the most trusted traction management solutions for off-road, racing, and street-performance applications. Eaton's position as both an OEM supplier and a performance aftermarket brand gives its products an unusual combination of engineering rigor and enthusiast credibility. Builders who want proven, race-tested traction and boost solutions choose Eaton because the products have been validated at OEM production volumes before reaching aftermarket shelves.

Popular Upgrades

Eaton's most popular performance products include the Detroit Locker for rock crawling and off-road use on Dana 44, Dana 60, Ford 8.8, and GM 10-bolt and 12-bolt rear axles, the Truetrac helical-gear limited-slip for street performance and road racing applications that require smooth, automatic torque bias without mechanical lockup. Supercharger pulley upgrades for M90 and M112 roots blowers in Mustang Cobra, Cadillac CTS-V, and Pontiac GTO applications allow boost pressure increases of 2 to 5 psi over factory spec, unlocking meaningful horsepower gains on top of the base supercharger output. Eaton engine valves and valve train components are also available for high-performance domestic V8 and diesel applications requiring OEM-level reliability at elevated performance levels.

Performance and Handling

An Eaton Detroit Locker differential eliminates wheelspin by mechanically coupling both driven wheels simultaneously during acceleration, which transforms off-road traction on loose surfaces and significantly reduces axle shaft stress during hard launches on drag-prepared vehicles. The Truetrac's helical gear design provides progressively biased torque distribution without the torque steer or wheel hop associated with mechanical lockers, making it the preferred traction upgrade for daily driven and road racing vehicles that need predictable behavior at all speeds. Supercharger pulley upgrades on M112-equipped vehicles work best when paired with a custom tune, cold air intake, and supporting fuel system upgrades to safely manage the increased airflow and boost pressure.

What is the difference between an Eaton Detroit Locker and an Eaton Truetrac?

The Eaton Detroit Locker is a mechanical locking differential that fully couples both driven wheels together during acceleration, providing maximum traction at the cost of some tire scrub and understeer during low-speed cornering on pavement. The Eaton Truetrac is a helical-gear limited-slip differential that automatically biases torque to the wheel with more traction without fully locking, making it more suitable for street driving, road racing, and applications where tire scrub is objectionable. The Detroit Locker is the preferred choice for off-road and drag racing use, while the Truetrac is preferred for high-performance street cars and road course vehicles.

What vehicles use the Eaton M112 supercharger?

The Eaton M112 is used as factory equipment on the 2003 to 2004 Ford Mustang Cobra SVT producing 390 horsepower, the 2004 to 2006 Pontiac GTO with the LS2 engine option, and the first-generation Cadillac CTS-V, making aftermarket pulley and inlet upgrades widely available for all three platforms. Ford Racing Performance Parts and Kenne Bell also produced M112 upgrade kits for Mustang Cobra applications. Pulley sizing for the M112 is identified by diameter, with smaller pulleys spinning the blower faster and producing more boost pressure at the cost of higher heat output from the compressor.

Why These Parts Fit Right

Eaton performance products are listed by vehicle application, axle specification, and supercharger model to ensure correct fitment across differential, valve train, and forced-induction product lines. Detroit Locker and Truetrac product pages include ring gear size, spline count, and axle housing fitment data to simplify selection. Fast shipping and expert support are available for any Eaton performance product fitment question.

Maximize your power output with upgrades from our exhaust collection, explore traction and handling parts in our suspension catalog, and find airflow solutions in our air intake systems collection.