Mazda 12A & 13B Underdrive Crank PulleyLightweight crank pulley made from aircraft grade 6061 T6 aluminium for light weight, and black anodised for great looks. Offers faster acceleration through significant reduction of mass having to be accelerated by the crankshaft. The effect is similar to a lighter flywheel, and the car feels more lively and willing to rev. Pulley outside diameter is 88mm. Suits early 12A and 13B rotaries through to series 5 RX 7. Please check our other listings for

🛡️ Lifetime Warranty: Covered when installed with our Vinny Fab Turbo Brace system

fitting perfectly in tight spaces and ensuring a smooth installation

25 factory oil temperature port

If this is the case please select the Neo option from the dropdown menu above

available in three different designs:

NZ and anodised in a range of colours

please get in touch if you need more information before purchasing these parts

this advanced unit is designed for remote mounting in the engine bay to satisfy those higher horsepower

Adjust boost level

They are available in white only

WC34 Stagea RB20E

CNC Machined