Porsche's 935 is likely not only the fastest production-based racing car of all time but one of Zuffenhausen's most successful competition models. Porsche's introduction of the 930 Turbo for its 1976 model year was paralleled by a racing version, the Type 934, for Group 4, with three liters of displacement and a single turbocharger that helped the race car produce something in the neighborhood of 485 horsepower. While very fast, its chassis wasn't up to the task of handling all that power. Its replacement, the Type 935, resolved that issue. Utilizing some of the technology gleaned from the 911RSR 2.1 Turbo of 1974, the 935 was built for Group 5, which was now separated from the true prototypes. While it appeared to be a slope-nosed 911 with wide fenders and an oversized "whale tail" from the outside, it was in fact a purpose-built silhouette racer. Its suspension was changed from torsion bars to the 917's coil springs, and a driver-controlled rear anti-roll bar was utilized. 917 brakes