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This is a bypass block designed to eliminate the oil filter and housing on Mazda Rotary engines
so no modification or welding to the vehicle is required
Suits early 12A and 13B rotaries through to series 5 RX-7 (vehicles with 15 mm alternator shaft)
Installation Instructions
Sold individually
Mazda 12A & 13B Underdrive Pulley Set Hose & Fittings This is a bypass blockLightweight pulley set made from aircraft grade 6061 T6 aluminium for light weight, and black anodised for great looks. Set contains: crank pulley, alternator pulley and waterpump pulley. 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. Crank pulley outside diameter is 88mm. Alternator pulley
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