Some facts from Wikipedia:
Abarth 595, derived from Fiat 500Abarth is an Italian racing car maker foundedby Austrian-Italian Carlo Abarth and Italian Armando Scagliarini in Turin in
Carlo Abarth began his well-known association with Fiat in 1952, building theAbarth 1500 Biposto upon Fiat mechanicals.
In the 1960s, Abarth & C. S.r.l was quite successful in hillclimbing and sports
car racing, mainly in classes from 850cc up to 2000cc, competing with Porsche
904 and Ferrari Dino. Hans Herrmann was a factory driver from 1962 until 1965,
winning the 500km Nürburgring in 1963 with Teddy Pilette
Later, Johann Abt was promised by Carlo Abarth that he could drive a factory car
for free if he won all the races he entered—which Abt nearly did, winning 29 of
30, the 30th being a second.
Along with its racing cars, Abarth produced high-performance exhaust pipes.
Later, Abarth diversified in producing various tuning kits for road vehicles,
mainly for Fiat. Abarth was also associated in producing sports or racing cars
with Porsche and Simca.