The stock brakes, having been snatched from the M3 parts bin, did not receive an upgrade; they are more than adequate to stop the lighter car. Cast BBS 19-inch wheels ($2,900/set of four) are a half inch wider at front and rear (9.5 and 10.5 inches, respectively) and wear recommended Michelin Pilot Super Sport rubber (275/30-19 and 295/30-19, respectively). The look of the special BBS rim is a near clone of the stock BMW design, but with black milled spokes and a polished stainless rim protector. An optional forged monoblock wheel in a different style is also available.
Accessories are tasteful and understated; a carbon-fiber spoiler and mirror caps, aluminum foot pedals, and a Dinan trunk-lid badge discreetly identify this as a very special 1M Coupe.
Dinan Engineering in Morgan Hill, Calif., or any Dinan-authorized shop can perform the installation, although enthusiasts with mechanical chops might prefer spending quality time with their own 1M. The transformation is truly impressive, as the Dinan S3-R BMW 1M Coupe goes faster, feels tighter, handles sharper, sits wider, sounds better, and looks even more purposeful than the car from which it is derived. (800.341.5480, www.dinancars.com)