I'll give it to you since you got the 962 part

It's The Lowenbrau 962-HR1 IMSA GTP with car 19 podium finishes and 11 of those overall wins. Six pole starts as well. Drivers include the legendary Al Holbert, Unser Jr, Chip Robinson, and Derik Bell. In the 1987 Daytona 24hr's all four drivers raced the car at some point and turned out to be the first time the car ever finished OUT of the top 10.
I like my GTP
What uber famous racetrack had two opposing chicanes added to it's straight in an attempt to hinder the overall speed of the cars?