RACE Mazda Rotary Underdriven Multi Rib Pulley Kit

Designed and manufactured in-house using aircraft grade 6061 aluminium billet.
This kit is designed for all out high RPM engines with maximum alternator and waterpump under-drive, reducing waterpump cavitation & freeing up as much HP as possible. The 5PK belt has significantly more grip and less frictional loss than a Vee belt. Engine idle speed must be 1600RPM or higher.
No risk of thrown belts, as with single and double Vee pulleys. -Lightest kit available with a combined pulley weight of 450grams.
Machined to tight tolerances eliminating runout and wobble. -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 (12A thru FD) by means of a removable sleeve (included).
35 micron semi hard black anodised for surface toughness and longevity (WP & ALT pulley).
55 micron hard anodised crank pulley (crucial for preventing the front main seal cutting into the pulley).
TDC mark etched into crank pulley.
Supplied with OEM quality Mitsuboshi belt.