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The Gibson Dual Muffler Replacement Exhaust Systems for Cadillac will provide a more powerful exhaust rumble sound. They will also improve the acceleration and horsepower gain of your vehicle. You will surely experience far better performance than stock when you upgrade. These exhaust systems are easy to install, and simply bolt on to the frame. You can choose between aluminized or stainless steel mandrel-bent tubes, both works and performs really well. All Gibson Exhaust Systems are backed by a Limited Lifetime Warranty.