For carbon-fiber wheels, there are only a couple of options out there. Carbon Revolution supplies wheels for the Ford Mustang GT350R and sells its one-piece CR-9 carbon fiber wheels for about $16,000 a set. Carbon Revolution says its products will improve acceleration, handling, steering response and tire grip, while reducing stopping distances, fuel consumption and road noise. Full details at www.carbonrev.com. Similar advantages are available from Vitesse AuDessus, which produces original and bespoke carbon-fiber wheels for Ferrari, Lamborghini, Bugatti and McLaren. With a starting price of more than $35,000 a set, exclusivity is virtually guaranteed. Visit www.vitesseaudessus.com.