The G-Power upgrade pushes the output of the range-topping BMW Z4 sDrive35i from 306hp (228kW) to 345hp (257kW)Enlarge Photo
Since the Z4 tuning program is still in its infancy, G-Power’s new upgrades could be considered very mild when compared to its previous creations. Nevertheless, there are still some interesting enhancements available for the stylish Z4 Roadster.
First up is a new ‘Bi-Tronik’ ECU upgrade for the range-topping sDrive35i model. This pushes power of the car’s 3.0L twin-turbocharged six from 306hp (228kW) to 345hp (257kW) and torque from 295lb-ft (400Nm) to 354lb-ft (480Nm). To enhance the sound emanating from the car G-Power also offers its ‘Deeptone’ stainless steel muffler.
This is followed by a set of 20in alloy wheels and a fully-adjustable coil-over suspension kit with nine different settings. Naturally the performance figures benefit from this output improvement. Accelerating from stand still to 100km/h now takes just 4.7 seconds.
Stay tuned for much more extreme performance mods as development work continues.