The bumper's aggressive lines flow laterally into widened carbon quarter panels that replace the metal factory panels entirely. These panels are notable for not just their extreme fender flares, but also for the large vertical vents designed to allow better airflow over the front brakes.
The package's aggressive lines continue rearward by way of GTRS3 side skirts and eventually interface with the silly-width rear flares. These are carbon as well, but rather than representing complete panel replacements as up front, the rear flares are bonded to the factory sheetmetal.
The kit is capped at the far end with a GTRS3 rear bumper section featuring vents behind the rear wheel wells and an integrated carbon diffuser. Items additionally available from Vorsteiner but not necessarily included in the GTRS3 aero package include the CSL-style trunklid and GTS vented hood. Additionally, the widebody kit can be complemented with single- or three-piece Vorsteiner alloy wheels; the latter are present on this vehicle, sized 20 inches in diameter and strung with Michelin Pilot Sport PS2 summer tires measuring 285mm wide in front and a whopping 325mm in back.
Brembo GT brake assemblies have been installed behind the wheels. Red monoblock calipers, 365mm front and 345mm rear cross-drilled rotors; you know the story. The widened chassis has been dumped over the running gear using KW Automotive V3 coilovers, which include electronic signal interceptor boxes at each end of the car to trick the factory Electronic Damper Control system into thinking it still works (it doesn't, and the car now rides on the manually adjustable KWs at a predetermined height).
All Vorsteiner body mods and aero component installations were performed at C&C Collision in Pasadena, Calif. C&C is also selected as the exclusive North American installer for the GTRS3 kit and provided the matte "Military Green" paintwork and the USAF design accents. Those accents are in fact paint, albeit of a different, less permanent grade than the base coat so they can be removed if desired.
At day's end, Nik tosses me the key and invites me to a downhill carving session. Ignition on, M mode engaged, flip the righthand DCT paddle to get it in gear, and away we go.
It quickly occurs to me that driving this thing is not unlike driving something like a Lamborghini, what with its newfound thrust, 620-odd horses worth. But more than that, it's those flares that give the car what seems like half a foot of extra girth. I envision the rear flanks hanging off the road's edge, catching brush and debris, and find myself cheating toward the center line. A half dozen bends in and I settle down a bit, and I'm able to relish the humongous grip from those meaty Michelins.
More incredible is the smooth pull from the supercharged V8. It is so smooth, in fact, that the car builds speed deceptively, so I continue taking the turns gingerly. There's no question there's a lot more power and torque available, but it feels completely controllable. No drama whatsoever; it's almost dreamlike. And the DCT manu-matic helps make driving this 620-hp machine a largely point-and-shoot affair.
As far as forced induction goes, you couldn't really ask for more.
2008 BMW M3
Longitudinal front engine, rear-wheel drive
4.0-liter V8, dohc, 32-valve. VF Engineering VF620 supercharger kit, GIAC engine calibration, Vorsteiner VTS titanium exhaust
Seven-speed DCT automated manual
KW Variant 3 coilovers
Brembo GT assemblies
Wheels & Tires
Vorsteiner V-308, 10.5x20 (f), 12.5x20 (r)
Michelin Pilot Sport PS2,
285/25 (f), 325/25 (r)
Vorsteiner GTRS3 widebody aero kit, GTS hood, VCSL trunklid
Vorsteiner floor mats
Peak Power: 620 hp @ 8000 rpm
Peak Torque: 410 lb-ft @ 7000 rpm