The car is an 04 coupe with the stillen true dual exhaust and stillen stage 4 supercharger.

The previous owner told me that he replaced the stock cats with custom test pipes, and that the precats were removed.

Where are the precats? he told me that they were quite large, sorta like the cats. And that i'd also want to reinstall precats and the stock cats.

Are there any issues with running stock cats without precats? Or should I get the precats (anyone have a set?)

thanks!
-Cory

 

In theory depending on your state, you can [the judge can] force the owner who violated the Federal Clean Air Act to pay the cost of oem restoration. He committed fraud when selling you the vehicle especially if he presented a passing emission certificate.

Your admitting he told you makes you a party to the violation.

 

There shouldn't be any issues I think, besides having your service engine light on from the O2 readings since they don't have cats.

 

mostly curious about the precats, where are they? Do i need them?