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· Registered
2006 CTS-V
529 Posts
Vibrant makes some very nice cats, they are however not drop in.

Magnaflow makes nice metal core cats also. Again not plug and play.

Tru bends does list stock replacement high flow cats.

I have kooks cats with my setup and I'm very happy with them.

Do the mallets have a stock exhaust or long tubes? Either way you are most likely going to be welding in a set.

Best advice is get a 200 cell if you need max performance and noise, a 400 cell for less noise and minimal impact on performance.


· Premium Member
'05 CTS-V, '12 CTS-V Manny Vagon
6,136 Posts
way back in the day, one of my first upgrades was a set of Ranom Tech cats. There were OEM replacements. The cats themselves were very nice, I never had any isseues in the 45k I had them. You'd have to get some 3" with a high flow rate. They do makde them from 8 liter plus Vipers, so I'm sure they have something that will wortk. Might want to call vivid?

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