PISTON ROD 15MM OD STUD TOP 4IN

The PISTON ROD 15MM OD STUD TOP 4IN is a precision shock shaft engineered for high-performance suspension systems, specifically designed for QA1 5Q and 53 Series shocks. This component serves as the critical internal rod that transfers dampening force and maintains structural integrity under extreme driving conditions. Whether you're building a competition vehicle, upgrading a street rod, or servicing a performance suspension system, this piston rod delivers the reliability and precision that separates quality builds from mediocre ones.

Manufactured from hardened steel and finished with a protective chrome plate, the PISTON ROD 15MM OD STUD TOP 4IN resists corrosion and extends service life in demanding environments. The 15mm outer diameter (OD) provides the optimal balance between strength and weight, while the stud-top design ensures secure mounting within QA1 shock cartridges. The 4-inch stroke rating indicates this rod is calibrated for suspensions with a 4-inch range of motion, making it suitable for vehicles requiring moderate to aggressive ride height adjustment and dampening control.

Serious suspension builders and mechanics benefit most from stocking this rod for warranty replacements, custom shock rebuilds, and original equipment restorations. Compatibility is strictly limited to QA1 5Q and 53 Series shock assemblies, so verify your shock model before ordering. Installation requires proper suspension knowledge—the piston rod must be carefully seated within the shock body to avoid seal damage or dampening fluid leaks. At just 0.59 pounds, this component is lightweight enough to minimize unsprung weight while maintaining the structural rigidity essential for consistent suspension response.