isx after treatment

[kozakvod]

You wouldn't be able to trick the system in that way. Those filters are constantly calculating pressures differentials (inlet and outlet) and if you left everything as it is and inserted a "straight pipe" (muffler or otherwise) style replacement it wouldn't be able to properly calculate and thus throw more codes.

The other issues and perhaps even more stressful, when DOT looks under your truck and they don't see what they know should be there...Then you have larger issues to deal with than after-treatment fault codes.