ProX Valve and Spring Kit Exhaust Yamaha | 28.SES2414-1 Blue stainless steel rotors are slotted

stainless steel rotors are slotted to stay cool so you get the braking power you need when you need it

2018 - 450 SX-F

1 of the holes will need to be drilled in the bumper

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ProX Valve and Spring Kit Exhaust Yamaha | 28.SES2414-1 Blue stainless steel rotors are slottedReplaces the OEM valves and valve springs Steel, nitrided valves for increased durability and less wear under extreme conditions Stronger valve springs deal with the extra weight of the steel valves Springs are made from premium chrome vanadium steel for higher performance and durability at high rpm Kit contains a set of steel intake or exhaust valves plus a set of specially designed valve springs; can be installed using the OEM retainers, bases and