Aston Martin V12 - Secondary Cat Delete PipesFitment for: Aston Martin DB9 (2004 2012), DB9 (2013 2016), DBS V12, Rapide, V12 Zagato, Vanquish (2012+), Virage These lightweight test pipes fit in place of the heavy OEM catalytic converters (8G43 5E211 AD). WILL NOT FIT the V8 Models. 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 are also removed, enhancing the aggressive