Resonators were added to the dual exhaust system on 1974 models which further helped quiet the interior. The radiator and shroud were revised for better low-speed cooling. The inside rear-view mirror width was increased from to . For the first time, lap and shoulder seat belts were integrated, but only in coupes. The FE7 Gymkhana "off-road" suspension included stiffer springs and a stiffer front stabilizer bar with no ordering restrictions. The new $7 FE7 suspension option was included with the Z07 package — The $400 package (also included H.D. power brakes) was available for L82 and LS4 cars with M21 transmission. 1974 was the end of an era for the Corvette with the last true dual exhaust systems, the last without a catalytic converter and the last use of the big block engine.