Dubbed "Super Hugger", the second-generation Camaro was developed without the rush of the first generation and benefited from a greater budget justified by the success of the first generation. Although it was an all-new car, the basic mechanical layout of the new Camaro was familiar, engineered much like its predecessor with a unibody structure utilizing a front subframe, A-arm and coil spring front suspension, and rear leaf springs. The chassis and suspension of the second generation were greatly refined in both performance and comfort; base models offered significant advances in sound-proofing, ride isolation, and road-holding. Extensive experience Chevrolet engineers had gained racing the first-generation led directly to advances in second-generation Camaro steering, braking, and balance. Although it began its run with a number of high-performance configurations, as the 1970s progressed, the Camaro grew less powerful, succumbing, like many production cars of the era, to the pressures of tightening emissions regulations and a fuel crisis. Major styling changes were made in 1974 and 1978; 1981 was the final model year for the second-generation Camaro.