EXHAUST VALVE SPRING PSYCHIC HEAVY DUTY Model_XR 600 RP The ground breaking YF-System provides

The ground breaking YF-System provides unrivalled levels of energy and impact dispersion while providing the ability to customise the range of movement of the calcaneal tendon

Conforms to ASTM D6319 and EN 455 standards

Nut Diameter: 9 mm

06 standard and then some

EXHAUST VALVE SPRING PSYCHIC HEAVY DUTY Model_XR 600 RP The ground breaking YF-System providesThis heavy duty valve spring is built to withstand the thermal stresses and high pressures found in the exhaust tract. It provides the necessary force to ensure the valve closes securely and remains seated at high speeds. Treated for enhanced durability and resistance to tension loss over time. Specifically wound to offer a more robust spring rate than standard alternatives. Essential for maintaining peak cylinder compression and engine efficiency.