1974 Chevrolet Corvette

1974 Chevrolet Corvette Convertible â?" Numbers Matching L48 350 V8, Last Year for True Dual Exhaust Why This Car Is Special The 1974 Chevrolet Corvette holds a specific and well-understood place in C3 history, and collectors who know the model know exactly why this particular year matters. 1974 was the last year the Corvette left the factory with a true dual exhaust system â?" meaning two separate exhaust paths running from the headers all the way to the rear. Starting in 1975, federally mandated catalytic converters forced GM to route the exhaust through a single converter under the car, eliminating the true dual setup entirely. If you want a C3 Corvette with that factory-correct dual exhaust configuration and no emissions equipment restricting the flow, 1974 is your last opportunity.