Slk55 RENNtech engine thing? What does it do?

There is this wierd item in the Slk store and here is the URL:


http://www.slkworld.com/store/RENNtech-S鈥?/a>


What does it do? Does it make your engine look cooler? Is it a turbo thing? It's $3,000. Also-does it decrease your fuel economy? Thanks!|||FROM THE ADVERTISEMENT;





CARBON FIBER AIRBOX is more than an attractive bolt-on accessory with a RENNtech logo; by changing the path and volume of airflow, RENNtech is able to offer gains with custom SOFTWARE that is at the cutting edge of tuning technology, RENNtech has inspired some of the most advanced software upgrades on the market today. RENNtech customers experience improved throttle response, more aggressive transmission shift patterns, increased speeds, and (of course) more power. *385 HP @5750 RPM (+30 HP) *405 TQ @3500 RPM (+29 TQ) *Gains at Flywheel As with all RENNtech products, only the best available processes and materials are used, from high end carbon and superior resins to autoclave technology - you can be sure you're getting only the best Your ECU must be shipped to RENNtech (please include a copy of your recipt with the ECU)CARBON FIBER AIRBOX is more than an attractive bolt-on accessory with a RENNtech logo; by changing the path and volume of airflow, RENNtech is able to offer gains with custom SOFTWARE that is at the cutting edge of tuning technology, RENNtech has inspired some of the most advanced software upgrades on the market today. RENNtech customers experience improved throttle response, more aggressive transmission shift patterns, increased speeds, and (of course) more power. *385 HP @5750 RPM (+30 HP) *405 TQ @3500 RPM (+29 TQ) *Gains at Flywheel As with all RENNtech products, only the best available processes and materials are used, from high end carbon and superior resins to autoclave technology - you can be sure you're getting only the best Your ECU must be shipped to RENNtech (please include a copy of your recipt with the ECU)





............... and almost any modification that adds HP also uses more fuel.