From a frugal economy four cylinder to a blistering eight cylinder. The hoptro build your own engine ® is the most efficient and quickest way to build an engine for your boat or vehicle!


Choose between a simplistic OHV design with high torque or a high performance DOHC design with high hp and 4 valves per cylinder.
Turbos are available but will need some simple tubing
V8 turbos need no tubing.

Coming soon:
I6 engines
Radial engines
Superchargers
Transmissions
Labels and logos
And much more.

Pre order today by typing T in the comments!

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