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The Ultimate Mazda RX-4 street car

In Feature by fullboost

A great example of a modified and street driven Mazda RX-4, Dunch’s coupe is powered by a Promaz 20B 3-rotor billet rotary engine boosted by a Garrett GTX47 turbo, FuelTech EFI and …

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Building a 1500hp Billet 20B 3-rotor

In Tech by fullboost

For over 20 years, Australian Mazda performance power house Promaz, has specialised in everything rotary engine powered. From mild street engines to utterly wild race applications, Promaz also carries out complete driveline …