The Boreham Ten-K is a buzzy, naturally-aspirated 2.1-liter four-cylinder engine that can rev to 10,000 rpm and makes 325 ...
Motor1.com on MSN
This Tiny Four-Cylinder Engine Revs to 10,000 RPM
The latest innovative engine is from Boreham Motorworks, which is showing off its new Boreham Ten-K naturally aspirated ...
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