Active Autowerke BMW E36 M3 Supercharger Kit Level 2 (Rotrex C38 Blower)Active Autowerke BMW M3 Supercharger Kit Rotrex Blower Level 2 No one buys a BMW M3 because they like limits. Here at Active Autowerke, we know that well. This carefully engineered BMW M3 Supercharger kit matches the Rotrex C38 supercharger with the perfect hardware, software and tuning to take the factory 240 HP straight up to over 400 HP 350 HP at the wheels (with the potential for even more power with our ultimate Level 3 kit). The level 2 version