Top 5 Boxster 986 performance mods

This time on Road and Race we look into increasing horsepower by fitting performance mods. As you all know by now I own a 986 Boxster S. On this episode I wanted to look into the options you have when trying to increase the horsepower of the engine. Although these will be specific example for the Boxster the principles can be applied to any combustion engine car. 1.987 Airbox and intake 2. Underdrive pulley 3. Larger 996 throttle body and plenum 4. Performance sports exhaust. 5. ECU remap