Performance Eng

About Performance Engineering & Manufacturing (PEM Racing)

Performance Engineering & Manufacturing, better known to racers as PEM Racing, is a Missouri-based manufacturer with over 25 years of expertise in high-performance drivetrain components. PEM Racing has built a reputation among oval track, drag racing, and off-road enthusiasts for delivering precision-engineered parts that hold up under the most demanding conditions on and off the track.

Based in Saint Clair, Missouri, PEM Racing focuses exclusively on the driveline — the critical system that transfers power from the engine to the wheels. Rather than spreading across a broad catalog of unrelated parts, PEM's philosophy is depth over breadth: every product they manufacture is designed and tested to meet the rigors of competitive motorsport. That singular focus has made them one of the most trusted names among professional and amateur racers alike.

Core Product Lines

PEM Racing's lineup centers on rear-end and gear components for popular platforms including the iconic Ford 9-inch rear end, the Ford 8.8-inch, and a range of GM applications. Their Differential Ring and Pinion sets are among their most celebrated products, available in multiple gear ratios and finished with an optional REM® surface treatment that reduces friction and drag — a meaningful edge in any racing environment.

Complementing their gear sets are their Differential Spools, which replace conventional limited-slip or open differentials with a solid, direct-drive solution preferred in competitive racing for maximum traction and power transfer. PEM offers both full spools and lightweight mini spools to suit different weight targets and racing classes.

For builders assembling or refreshing a complete rear end, PEM also manufactures Axle Assemblies — including gun-drilled axles, flanged axles, and double-spline axles engineered to handle high-horsepower applications without compromise. Paired with their Wheel Hubs, including Grand National (GN) hub assemblies and related hardware, these components form the foundation of a race-ready driveline built to last.

Why Choose PEM Racing?

• Race-proven performance: PEM components are trusted by champions across oval track, drag racing, and off-road disciplines.
• Precision manufacturing: Parts are produced to tight tolerances using quality materials including billet steel and lightweight aluminum alloys.
• Specialty finishing: Optional REM® finishing on gears and bearings reduces friction, heat, and wear for longer component life.
• Comprehensive catalog: From complete center sections to individual hardware, PEM provides everything needed to build or service a performance rear end.
• Veteran-owned business: PEM Racing operates as a veteran-owned American manufacturer, bringing dedication and discipline to every part they build.

Whether you're building a circle track car from scratch, freshening up a drag car's rear end, or upgrading an off-road rig, Performance Engineering & Manufacturing delivers the precision and durability that serious motorsport demands.