tuner car
n.— «Steve Saleen stresses that his cars are not tuner cars.…S351s are sold only as entire cars, not a bunch of pieces. And though they are certainly modified Ford Mustangs, they are production cars, not one-offs with specially ported and polished heads and other tweaks that might help the care eke out a few extra mph.» —by Thos. L. Bryant Road & Track: Ford Mustang Portfolio 1994-2002 Jan. 1, 2003. (source: Double-Tongued Dictionary)