The '70 Sport Fury GT's exterior package included hidden headlights, twin hood bulges, and a reflective strobe stripe around the middle. The Air Grabber, however, was not available (a family car did have to make some concessions, after all).
The Sport Fury GT was a pure 440 car-either base or Six-barrel, as no other engines were available. It was touted as even roomier than the GTX, and the ideal family sports car. A new stripe package was the most obvious change to the '71 Sport Fury GT, with a dual "GT" hood stripe and full-length strobe stripes. But the engine remained the same-a standard four-barrel 440 V8. While the Fury body continued, the Sport Fury GT was discontinued after 1971.
Likewise, the GTX met its end after 1971 (except for the Road Runner GTX). Like the Road Runner, the '71 GTX had been switched from a Belvedere body to a Satellite. The '71 GTX also came with a standard 440 four-barrel V8 as well as bucket seats and a TorqueFlite automatic. It featured side-facing hoodscoops and a transverse hood and fender stripe. While the Hemi was still available on the '71 GTX, only 30 were produced, and fewer than 3,000 GTXs in all.
The emissions regulations, gas shortages, and high insurance premiums that combined to end the musclecar era cut short one of the most successful advertising campaigns in Mopar history. Still, the Rapid Transit System has never completely gone away. It remains a niche within a niche, and rightly so, because anybody can offer a car, but only Plymouth offers a system.