The MagnaFlow xMOD Series Cat-Back Performance Exhaust System with polished finish #19578 for the Chevrolet Corvette C8 offers the modularity of MagnaFlow’s xMOD series in a compact package designed for high performance and durability. It took days of dyno and track testing to ensure that this exhaust kit does all this while enhancing the exhaust sound with our deep signature tone. MagnaFlow #19578 boosts the max power of your C8 by up to 18 hp and 17 lb. ft. of torque, with peak power gains of up to 12 hp and 13 lb. ft. of torque.†