BMW’s 1M is a fantastic addition to the M-division bloodline. You would think its blend of straight-line performance and chassis dynamics would hardly need updating. Renowned BMW aftermarket tuner, AC Schnitzer, thinks differently, though.The Aachen-based tuner has been developing a range of upgrades for 1M owners who require further personalisation of their cars – which is a curious bout of marketing conjecture as the 1M is already a (very) limited edition offering, with South Africa, for example, only receiving 71 units.If you ignore the limited marketing uptake for AC Schnitzer’s 1M conversion, and unpack the actual technical details, it’s quite a striking package – and quite simply any E92 M3 owner’s nightmare…M3-KILLER, PLAIN AND SIMPLE...For those who thought the 1M could not possibly be made to look more aggressive, AC Schnitzer's Frankfurt auto show-bound demonstration model is an example to the contrary. It adds chrome detailing to the front grille (which makes for quite a garish styling upgrade), swaps the standard front and rear spoiler/diffuser combination for carbon-fibre material items and carves some rather elaborate ventilation ducts into the 1M’s bonnet.Hiding behind the 20-inch AC Schnitzer alloy wheels are larger brake rotors (380mm front, 355 rear – larger by 20- and 5mm over the standard car) and bound/rebound height adjustable suspension. Considering the factory 1M already features BMW E92 M3 specification brakes, rear-axle and lockable rear differential, what manner of power increase would possibly necessitate even beefier brakes and suspension components?Well, thanks to some fiddling with the 1M’s 3-litre, twin-turbo in-line six’s engine control software (and the addition of some exquisitely crafted AC Schnitzer exhaust system), power’s been boosted from 250- to 294kW, with torque swelling by 50 units to an overboost peak of 560Nm. The result? A benchmark 0-100km/h sprint in 4.7 seconds dead, and top speed of 300km/h. Beyond the garish styling upgrades (and stupendous engine, brake and suspension modifications), AC Schnitzer trims the 1M’s cabin with a surfeit of Alcantara (which is quite some feat, considering the standard 1M’s already got plenty of the artificial suede trim added), and adds an aluminium touch to most of the switchgear. So, if you think your 1M is not quite special enough and would like to leave neighbourhood E92 M3s trailing in your wake, this latest BMW tuning package from AC Schnitzer should be perfect for your requirements.