***Before your order ships you MUST sign and return the Off Road Use Only Waiver available HERE. Please email, fax or take a photo of the completed form. You can email it to your sales rep or to [email protected] and you can fax it to us at (305) 253-8921***

The BMW 4.4L (5.0) Twin Turbo motor is BMW's newest powerhouse. From the factory this engine produces 400 HP and 450 Ft Lbs of torque. Through careful engineering and countless hours of R&D Active Autowerke is able to raise the power levels by 40 rear wheel horsepower and 40 ft lbs of torque. This power increase has been obtained by increasing the boost levels and modifying the fuel and ignition tables. All this has been in done while maintaining the factory characteristics that BMW engineered this engine/Ecu combination to work with. The Active Autowerke upgraded software is designed to operate with gasoline that has an average octane rating with full emissions to create a clean burning combustion with good AFR's all within factory specifications. Looking to bring your 4.4 Twin Turbo motor to the next level? This upgrade is a must for the BMW enthusiast lookin for over 460 HP and a powerful 500 ft lbs of torque.