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Racing Valve Spring (OS3) – Oval Shape R15 / NVX / MT-15

*ID13.4 *35.4L* Compression Pressure 72.5KG @ 22MM Lift up to 10.5MM Max RPM @ 14800 135psi @22mm

This product has multiple variants. The options may be chosen on the product page

Racing Valve Spring (OS3) – Y15ZR

Compression Pressure 71KG @ 24MM Lift up to 11.5MM Max RPM @ 15300RPM

This product has multiple variants. The options may be chosen on the product page