Rebel is considered to be a precursor of the muscle cars (rear-wheel drive mid-size cars with powerful V8 engines and special trims) that became so popular in the 1960s. It also foretold that muscle-type performance would be included among AMC's models. Fuel injection option The Bendix Electrojector electronic manifold injection (EFI) was to be optional on the 1957 Rambler Rebel with a flashy introduction at the Daytona Beach Road Course trials. The Rebel's Electrojector equipped engine was rated at . This was to have been the first mass-produced engine with a transistorized "brain box" fuel injection system. A Rambler Rebel with the optional EFI was tested by Motor Trend, and they recorded this sedan going faster from a standing start than the 1957 Chevrolet Corvette with mechanical fuel injection. The Bendix system's public debut in December 1956 was followed by a March 1957 price bulletin listing it as a US$395 option, but because of supplier difficulties, EFI Rebels would only be available after June 15. This was to have been the first production EFI engine, but Electrojector's teething problems meant only pre-production cars were so equipped: thus, very few cars so equipped were ever sold, and none were made available to the public. The Rambler's EFI was more advanced than the mechanical types then appearing on the market and the engines ran fine in warm weather, but suffered hard starting in cooler temperatures. As a result, all of the production Rebels used a four-barrel carburetor. Nevertheless, the EFI option remained in the published owner's manual. Second generation 1958 For the 1958 model year, the Rebel name returned, but no longer with the 327 engine. Rather than identifying a specialty model, the name was applied to all Ramblers powered by AMC's V8 engine. Rebel came with a 4-barrel carburetor and dual exhausts rated at with of torque. The 327 engine was made standard in the more luxurious Rambler Ambassador models. The 1958 Rebel lineup encompassed six models: Super or Custom trimmed four-door sedans and Cross Country station wagons, plus a base Deluxe four-door sedan that was reserved for fleet sales. A four-door hardtop in the top-line Custom trim was now Rebel's sole pillarless model. These Rebels were no longer the muscle car of 1957, but did offer more power than regular Rambler models. A test by Motor Trend concluded "the V8 powered Rebel is now able to reach a true 60-mph