1971 IMSA GT Championship
Pos Constructor Rd 2 Rd 4 Total
1 Porsche 9 9 54
2 Austin-Healey 1 1 3
3= MG 2 2
3= Alfa Romeo 2 2
5 Lotus 1
Constructors ' Championship -- GTU standings
The 1971 IMSA GT Series season was the inaugural season of the IMSA GT Championship auto racing series. It was for Grand Tourer-style racing cars which ran in the GTO and GTU classes, as well as former Trans Am Series cars in the TO and TU classes. It began April 18, 1971, and ended November 21, 1971, after six rounds.