with a few choice modifications that add 40 horsepower. The M4 CSL is now the most powerful 4 Series, totaling 543 hp at 6,250 rpm and offering 479 lb-ft of torque up to 6,000 rpm. The motor gets ...

This new Stealth E40 outboard combines a water-cooled PMAC electric motor and sinusoidal controller mated to conventional outboard motor components. Equivalent to a 40 hp gas outboard, it comes in a ...

Just imagine, you can gain more than 40 hp and between 20 and 25 lb-ft of torque without tearing into the engine. That’s 40 hp and 20-plus pounds of twist with cold air, a larger throttle-body ...