Were you ever able to solve your P2101 problem with your previous radix set up? My set up is nearly identical to your old mp112 with an LS3 throttle body and X-link. I've been trying to solve this for months with no luck, thanks

your muffler is it a tru x? I see it is dual in dual out so why go that way vrs two mufflers? I am doing a system now and was thinking the tru x over two mufflers and a x pipe. How do you like the sound of what you have?? thanks
Joe