How is the most successful road racing chassis junk?
Championships
World Touring Car Championship; 1 title (1987)
European Touring Car Championship; 2 titles (1987 and 1988)
British Touring Car Championship; 2 titles (1988 and 1991)
Italia Superturismo Championship; 4 titles (1987, 1989, 1990 and 1991)
Deutsche Tourenwagen Meisterschaft; 2 titles (1987 and 1989)
Australian Touring Car Championship; 1 title (1987)
Races
Guia Race; 5 wins (1987, 1988, 1991, 1992 and 1993)
24 Hours Nürburgring; 4 wins (1989 – 1992)
Spa 24 Hours; 4 wins (1987, 1988, 1990 and 1992)
Or do you mean the body itself was junk?
Before dissasembly and acid dipping...
After
Then building all new subframes and putting in a 500hp all aluminum BMW V10 makes is bad? You're either a hardcore e30 M3 fan or jealous of it's success.