Flowmaster American Thunder Crossmember-Back Exhaust System 1976-mercury-grand-marquis-esi4706466 090 in Long - Bushed

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Flowmaster American Thunder Crossmember-Back Exhaust System 1976-mercury-grand-marquis-esi4706466 090 in Long - BushedThis Crossmember Back American Thunder system is custom designed for high horsepower and large cubic inch engines in 1968 1972 GM A Bodies with a V8 engine. It's a true dual exhaust system featuring all mandrel bent 3. 00 inch aluminized steel tubing with a built in H pipe crossover assembly flowing into a pair of large cased Super 40 Series performance mufflers for maximum power and a deep powerful aggressive exhaust note. The large 3. 00 inch