Mustang Engines & Power Adders - 2005-2009 is proud to offer a wide selection of 2005-09 Mustang crate engines and power adders to give your S197 more power and performance. Rebuild your 4.6L engine with a SCAT Stroker kit for more horsepower and give your engine a larger cubic inch displacement. We also carry a wide selection of Coyote crate engines if you are looking to Coyote swap your 2005-2009 Mustang. If you are looking to drastically increase the horsepower and torque of your 05-09 GT, an S197 supercharger is the way to go. offers both centrifugal and roots-style superchargers that will give your Mustang a huge increase in power. Lastly, you can add a nitrous kit to your S197 for a quick boost in power at the push of a button. These Mustang Nitrous Kits come in a variety of horsepower ratings to get you the exact amount of power you need! Choose from Nitrous Express or Nitrous Outlet kits such as the wet plate and single nozzle kits.