Small Engine Turbo (RHB31 VZ21)



Small Engine RHB31 VZ21 Turbo-ChargerSmall Engine Turbo Charger - RHB31 VZ21


This is a copy of IHI RHB31 turbocharger, the world's smallest turbo. We notice there are a lot of interest in the aftermarket to convert a natural aspired small engine to turbo charged. While the genuine RHB31 turbo is not easily available to the aftermarket, we carefully source a copy of it from an established manufacturer. Let's be honest: this copy may not have the same quality as the genuine one, but it is fairly well built and we provide tech support and customer service for it.

This turbo is a good choice to turbocharge the small engine on your motorcycle, scooter, dirt bike, ATV, go kart, buggy, and snowmobiles. This turbo works well with our turbo version of small engine EFI kits. Together, VZ21 turbo and our EFI conversion Kit would match perfectly. With one stop shopping, you can get a turbo and an EFI system to convert your small engine from carburated to turbo-charged and fuel injected, with no worry about issues on forced air induction with a carb.

Note: this turbo is suitable for 125cc to 600cc engines. Engines that are too small would not have enough air flow to push the turbo to generate meaningful boost.

Click Here for our Small Engine Fuel Injection Kit for Turbo

Small Turbo related documents:
ECOTRONS Turbo VZ21 technical spec
ECOTRONS Oil pump technical spec
ECOTRONS Oil cooler technical spec

RHB31_VZ21
click to enlarge
RHB31_VZ21
click to enlarge
Small turbo Auxiliary parts
Small turbo Auxiliary parts
Turbo assembled with the accessories
Turbo assembled with the accessories
Oil pump
Oil pump
Oil cooler
Oil cooler

Small Engine Turbo (similar to RHB31 VZ21) @ $299 USD

Oil pump $59 USD

Oil cooler $39 USD

Accessories (flanges, gaskets, oil inlet/outlet fittins, fixtures) total: $89 USD


Software and Documentation
Download documentation and software from here...

Our products are one month returnable, one year warranty!
Click here for Terms and Conditions...

We accept Paypal payment, and credit card payment!
Credit cards:
How to pay with your credit card without a Paypal account?