Nearly all Harley-Davidson engines have the company's hallmark V-Twin design, and iconic sound and power. Here are the ones we think are the best of the bunch.

As of today, the 121 V-Twin Harley-Davidson engine is highly exclusive and offered with select CVO models only.

Harley-Davidson has announced its first black Milwaukee Eight engine in the new Road King Special bagger and will no doubt shoehorn it into more bikes soon.

It’s the company’s biggest bore kit for the M8 engine (yet), enough to transform your cruiser into a 150-horsepower beast. The flagship tourer has stability issues post 100 miles per hour ...

Power Gainz S&S just released the details on their new 131 CI stroker kit, aimed at bringing massive power upgrades to the highly successful Harley-Davidson Milwaukee Eight big twin engine. S&S has ...