These used cars offer big performance for a fraction of the original price, and with a few simple mods you can unleash serious horsepower.

You wouldn’t want to meet the KTM 1390 Super Adventure R in a dark alley at night. That’s all we’ll say about it.

The Dodge Coronet R/T occupies a curious place in muscle car history. It delivered the full force of late‑1960s American ...