At next weekend’s Rose Cup Races, there’s one group of cars that represents the heart and soul of amateur racing, and the deep history of the Rose Cup. The Small-Mid Bore race group comprises street cars of the 1970s, 80s, 90s and newer, lightly modified to improve performance and handling. These are the cars that have sustained local sports car racing for decades. Small-bore and mid-bore refers to the engine displacement of these cars, in contrast to the big-bore V8-powered cars in the Rose Cup race.
The cars you’ll find on track with the will include Datsun 240Z sports cars, BMW 3-series sedans, newer Nissan, Mazda, and Honda products and a variety of other import and domestic models. Each of these cars has been taken from street-legal trim and converted into a dedicated racing machine. The hard work and expense to do that conversion all comes from the owner/driver.