Mazda Rotary Underdriven Multi Rib Pulley Kit

Designed and manufactured to a high standard right here in NZ using aircraft grade 6061 aluminium billet.

Fits all 12A and 13B engines from RX2 thru Series 5 Rx7. (Will not fit twin distributor waterpumps or JC Cosmo waterpumps). Fits all alternators.

Diameters and resulting pulley speeds are optimised for waterpump and alternator efficiency. The 5PK belt has significantly more grip and less frictional loss than a Vee belt. We’ve designed this kit to have the least amount of horsepower loss possible. (has significantly less horsepower loss vs Gilmer drives).

No risk of thrown belts, as with single and double Vee pulleys.

Lightest weight kit available with a combined pulley weight of 450grams.

Machined to tight tolerances eliminating runout and wobble.

Vapour blasted prior to anodising to achieve a satin finish.

35um semi hard black anodised for surface toughness and longevity.

Crank pulley fits all rotary front hubs including FD.

Waterpump pulley fits all conventional 12A and 13B waterpumps (does not fit twin distributor , FD, JC Cosmo).

Alternator pulley fits all 15mm and 17mm shaft alternators by means of a removable sleeve (included).

Supplied with OEM quality Mitsuboshi belt.