The 320hp engine is also a special-build engine and is rated for off-road use.  It has a larger turbo with headers and an air-to-air charge cooler which is necessary to achieve the increase in horse power. 

Installation of this engine requires an electronic ECM update and larger exhaust with a catalytic converter and muffler. 

The engine runs cooler with the increased air flow as a result of turbo sizing and engine exhaust system redesign.  The increased performance of the 320hp engine is a dramatic change from the stock engine for a vehicle of this size. 

This installation should not be attempted by just anyone!