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For years, it has been a common belief that all Catalytic Converters place a choke-hold on engine performance. Independent testing by engine builders, racers, and automotive publications has repeatedly proven the superiority of these Catalytic Converters.
Magnaflow 1986-1991 C4 Corvette Catalytic Converters have been proven to out-flow the stock units allowing more exhaust gases to leave the engine quicker resulting in a more efficient and better breathing engine. The better your engine breathes the better it can perform and the better it sounds. These C4 Corvette Catalytic Converters are EPA approved.
Tech Note: Aftermarket catalytic converters are not legal for installation in California.