Capristo Aston Martin Vantage V12 - Dampened Secondary Cat Delete Pipes**fits Vantage V12 only These Cat Delete pipes WILL NOT FIT the V8 Models** These lightweight test pipes fit in place of the heavy OEM catalytic converters. Using a test pipes removes the flow restriction a catalytic converter places on an exhaust system, while increasing the horsepower. The silencing effect of the converters is reduced with the Dampened Cat Delete Pipes to enhance the aggressive engine sound, albeit with a resonator in place to limit