The transformation from a standard E91 3-Series Estate to super wagon begins with the exterior, where the car gets the front fascia, front fenders, side skirts, and the powerdome hood from the M3.
From Press Release we find some technical facts as:
Bodywork: M3 E90 front apron, M3 E90 front fenders, M3 E90 bonnet, M3 E90 side skirts, M3 E90 wing mirrors, Manhart Racing-designed, M3-style, rear apron, widened rear wheel arches in the style of the M3.
Engine: 5.0-litre V10 from the M5 E60, modified engine electronics, lifting of the Vmax limiter, complete stainless steel exhaust system with 2 x 200-cell HJS catalytic converters and 4 x 86mm exhaust pipes, tank from the M3 E90, 550 PS.
Transmission: 7-speed SMG from the M5 E60, 100% limited slip differential from the M5 E60, front and rear axel from the M3 E90.
Chassis: Bilstein PSS10 coilover suspension, steering system from the M3 E90.
Brakes: Stoptech Sport Trophy Kit front and back, 6-piston callipers and 380mm slats in the front, and 4-piston callipers and 355mm slats at the rear.
Wheel/Tyres: three-part RÄD Monza aluminium rims in 9.5″ x 20″ ET20 and 10.5″ x 20″ ET20, Hankook Ventus S1 Evo Tyres in sizes 255/30ZR20 and 295/25ZR20
Interior: heated BMW performance sports seats, leather-covered back seats in the style of the front seats, full leather interior with Alcantara roof and door lining, BMW performance steering wheel with illuminating indicator switches, acceleration and ¼ mile time displays.