I'm thinking about deleting the primary cats and building a remote operated bypass for the rear cats.
My goal is no drone, throatier exhaust and more power with no stink when I don't want it.
I figure this setup will get that done.
It looks like there is room to install bypasses (not dumps) around the rear cats (and back into the tailpipe to the stock resonator and stock mufflers)
Has anyone tried this?
Has anyone posted sound clips of catless stock mufflers?

 

I have two threads exactly about this along with dyno results and gains/losses from each mode.

The mid-pipe and cats are not restrictive, even with an SC so I recommend not touching it.

Videos with the cutout installed
https://www.clublexus.com/forums/is-...-f-videos.html

Dyno results and follow up
https://www.clublexus.com/forums/is-...t-testing.html