The car held its line like a champ but you could sense the fronts starting to give, although this was at ridiculous speeds. The owner set the KWs near the middle setting range in terms of firmness, and perhaps another click or two firmer would help keep the body motion under better control during hard acceleration and side-to-side transitions. But, then again, maybe I was over-driving it.

That test drive in the canyons was an exercise in restraint because there weren’t many stretches long enough to let the engine run to redline. And when the straights appeared, it was instant tunnel vision, a blur of canyon walls, trees and shrubbery. It didn’t matter which gear the transmission was in; the power came on relentlessly and didn’t run out of breath on the top end. This car’s most natural habitat would be the autobahn or on wide open desert roads in the West, where that old adage about too much power would be more valid. Tight roads might be fun and challenging, and even frightening, but the M3 feels like a caged (and rabid) animal in those confines.

Aesthetically, the car is unique because it uses a Hamann body kit that was designed for an M3 coupe. The wizards at Ranz Motorsport in South El Monte, Calif., reshaped the side skirts and front bumper to look as if they were designed for the sedan from the start. On the front bumper, they opened up the lower air intake to feed more air to the cooling systems, smoothed the bumper out and then painted the entire lower section black. Ranz also took a stock M3 hood and cut larger cooling vents into it, as well as adding vents to the rear bumper. Hamann’s rear roof spoiler and trunk spoiler add visual weight and aerodynamic function the rear.

Inside, it’s just as different. Top Stitch, also of El Monte, covered the headliner, pillars, sunvisors, door panels and BMW Performance steering wheel in Alcantara. They then replaced all the black stitching with white thread and added a racing stripe to the center of the seats. In terms of personalization, not many other M3s look quite like this one.

Or drive like it. The G-Power supercharger has transformed this M3 from a car that was perfectly usable and more than fast enough into something of a beast that you need to approach with caution. You can try to tame it, but it may break your spirit before you break its own.

G-Power SK II Clubsport M3

Layout
Longitudinal front engine, rear-wheel drive

Engine
4.0-liter V8, dohc 32-valve. G-Power SK II Clubsport supercharger kit (airbox, intake manifold, intercooler, ASA kompressor, ECU remap), Akrapovic GT4 titanium exhaust

Transmission
Seven-speed DCT automated manual, G-Power DCT programming

Suspension
KW Variant 3 adjustable coilovers

Brakes
Brembo six-piston calipers, 14.4-inch rotors (f), four-piston calipers, 13.6-inch rotors (r)

Wheels and Tires
Interad Super Concave three-piece forged alloys, 9.5x20 (f), 10x20 (r)
Michelin Pilot Sport PS2, 255/35 (f), 295/30 (r)

Exterior
Modified Hamann front bumper and side skirts, vented hood and rear bumper, Hamann roof and trunk spoiler

Interior
Alcantara headliner, door panels, pillars, visors and steering wheel, white stitching

Performance
Peak Power: 600 hp
Peak Torque: 427 lb-ft

SOURCE
G-Power GmbH
g-power.de
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