These 23 mm restrictors are to be used with part number RK-1000, the CIK-FIA approved K&N Kart Air Box. To properly fit these restrictors, minor modification of the K&N Kart Air Box is required.
These 23 mm restrictors are to be used with part number RK-1000, the CIK-FIA approved K&N Kart Air Box. To properly fit these restrictors, minor modification of the K&N Kart Air Box is required.

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