Reference 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.
Abarth was sold to Fiat on July 31, 1971, and the racing team sold to Enzo
Osella. Abarth became the racing department of Fiat, managed by famed engine
designer Aurelio Lampredi. Some models built by Fiat or its subsidiaries Lancia
and Autobianchi were co-branded Abarth, the most famous being the Autobianchi
A112 Abarth. Abarth also prepared Fiat Group's rally cars like Fiat 124 Abarth
and 131 Abarth. In the 80s Abarth name was mainly used to mark performance Fiats
like Fiat Ritmo Abarth 130 TC. The name was almost forgotten in 1990s and in
2000s it was used like a trim/model level on FIAT cars, like the FIAT Stilo