4.0L Headers?!?

I have the URD long tubes with the full URD Mk3 exhaust with no cats. Between 2.5-3.5k RPM's it gets pretty raspy. It needs modified for the rear cage & links, so will probably start tinkering with it after that is done until it sounds better. At idle/low RPM's it sounds really good in my opinion. A few folks have asked if I did an engine swap.

 

Yeah, I already installed Gibson's stainless set-up and the muffler has a subdued rumble to it that is really nice. Its Quite at idle, but noticeable when you get on it. So I don't want to mess with to many mods when it comes to eliminating the Cats completely. Just want to find out if the Magnaflow cats are the better route to go and if they are a little more free flowing. If so, that's how I'm leaning to avoid any headaches. Going to call Magnaflow today and get the lowdown and will let ya know what I find out after I get the results from Toyota's scan check back. Hoping its a bad sensor because she just hit 148,000, but we'll see and hell I've basically replaced everything else.