Iv been looking to upgrade my exhaust on a DB9 SE which has the DBS muffler/silencer. All the aftermarkets sell secondary cat replacements but shouldn't the primary cats be replaced?! I believe there are 4 primary cats up front. Any ideas?!

 

The primary cats are part of the exhaust manifolds. In order to replace them, it will be necessary to install a long tube or shorty header system.
I believe Stuart with velocity has been working on a system for the DBS/V12V.
This would free up another approximately 40hp on the car; and of course provide a much more aggressive sound!

 

Cool. I hear they are working on headers for the v12.