German tuning shop ATT TEC is trying to further close the performance gap between the BMW 335i and M3 Convertibles with the release of a new sport package that includes two stages of power upgrades. ATT TEC's basic kit, which is priced at €2,355, takes the 335i's standard 3.0-liter twin-turbocharged straight six from 306 HP and 400 Nm of torque to 345 HP and 481 Nm.

For €4,130, ATT TEC will boost the engine's output to 362 HP and 536 Nm while the new exhaust system that's included in this package will inform your friends of the changes under the hood.

The performance package is complemented by M3-style front fenders (€1,843 unpainted or €2,440 in your car's body color) and a set of 20-inch multi spoke alloy wheels wrapped in Michelin Pilot Sport tires size 245/30 ZR20 up front and 285/25 ZR30 at the rear (€3,475).