This particular model was homologated in "GT", the engine was a single plug 2.0L close to the "R" engine with around 180/200ps.
The twing plug was admitted only in France for "GT" cars.
For the 1968 and 1969 season, The 911 T/R was the best car in "GT" for rallye but also used for the Long distance race like the "24 heures du Mans".
Some race result of the T/R were :
1968 season :
Winner Over all and class GT : Rallye Monte-Carlo
Winner class GT : 24 heures du Mans
Winner class GT : Targa Florio
Winner class GT : 1000 km Nurburgring
1969 season :
Winner over all and class GT : Rallye Monte-Carlo
Winner class GT : 24 heures du Mans 1969
Winner class GT : 1000 km Nurburgring
Winner class GT : Targa Florio
Winner over all and class GT : 24 heures de Francorchamps