Early Rotary & 1975-85 Mazda RX-7 : Engine - Internal
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Aluminum Main Pulley - Double Sheave - 74-92 Rotary Engines (All)
The Racing Beat Aluminum Double Sheave Main Drive Pulley for virtually all 1974-92 12A and 13B engines is designed for high performance/RPM street and moderate racing use, slowing the water pump and alternator 13-15 %, thereby reducing cavitation... 
Oil Pressure Regulator - Street 80-85 PSI
The Racing Beat high performance Rear Oil Pressure Regulator is designed for use on all 1971-1992 12A, 13B, and 20B engines and interchanges exactly with the stock unit. As supplied by Mazda, the factory pressure regulator is intended to bypass at...
Aluminum Main Pulley - 74-92 Rotary Engines (All)
Racing Beat's Single Sheave Main Pulley for virtually all 1974-92 12A and 13B engines reduces the water pump/alternator drive ratio substantially to avoid water pump cavitation and alternator damage due to the extreme RPMs...
Race Oil Pump - 74-85 12A & 13B
The Mazda Competition Department Oil Pump, for all 1974-85 12A and 13B engines, interchanges exactly with the stock oil pump in all 1974-85 engines. The race oil pump rotor set width is 17.5mm, as opposed to 15mm in stock 1974-75 engines and 12.5mm...
