This 10,000-RPM Four-Cylinder Makes 325 HP Without Any Boost

When you have 16 valves, ITBs, and billet everything, you don't need a turbo to hit your power goals.
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Bespoke engine for reborn Ford Escort Mk1 RS revs to 10,000rpm

Set to be installed in the Ford Escort Mk1 RS restomod, the new Ten-K engine from Boreham Motorworks should offer thrilling ...