Yamaha Outboard 25hp 4 Stroke F25 Transom Bracket on 2040-parts.com

More Power! Get the details on the potent Porsche 911 GT3 RS 4.0

Porsche has ramped up the already heady performance of the 911 GT3 RS through the adoption of a new, naturally aspirated 4.0-liter version of the company's sturdy, horizontally opposed flat six-cylinder engine. The unit kicks out 50 hp more than the 3.8-liter six-cylinder used in the existing 911 GT3 RS. This mill claims 500 hp at 8,250 rpm, a figure which makes the speedster the most powerful naturally aspirated road-going version of the 911 ever.

2011 Ford Harley-Davidson F-150 gets power boost from the Raptor SVT

Ford is Raptorizing one of its top-flight F-150s for 2011, adding more power underhood to go with the loads of looks and leather that are the hallmarks of the Harley-Davidson edition. The 2011 model is fitted with the 6.2-liter V8--first offered in the Raptor SVT--that makes 411 hp and 434 lb-ft of torque while towing up to 9,300 pounds. That's a monster upgrade from the previous edition, which displaced 5.4 liters and made 320 hp and 390 lb-ft.

Audi adds V8 power to venomous R8 spyder

Will a V8 lessen the bite of the Audi R8 spyder? Unlikely. To complement the spotlight V10 engine in its supercar convertible, Audi is adding the 430-hp V8 to round out the powertrain lineup.