PAC Racing Springs

PAC Racing Springs is a leading American manufacturer of high-performance valve springs and precision-engineered valvetrain components, serving motorsports, aftermarket performance, and OEM applications. As the racing and aftermarket division of Peterson Spring Company, PAC brings over a century of combined manufacturing expertise to its product development, producing high-quality valve springs, retainers, seats, and related components designed for extreme engine conditions. Based in Southfield, Michigan, PAC Racing Springs designs, manufactures, and tests its products in the USA, focusing on durability, consistency, and fatigue resistance under high RPM and high-load environments. Trusted by professional engine builders, racers, and performance enthusiasts worldwide, PAC continues to set the standard for valvetrain reliability with advanced metallurgy, in-house engineering, and race-proven performance solutions built to withstand the most demanding applications.