Hi Guys, am doing the same upgrade at the mo to 2 110's. Exhaust is definitely a thing to conquer. No big deal. Be advised that the the standard 4BD1T has piston squirters and a Nitrided Surface hardened crank, where as the 4BD1 NA does not. The T engine might be good for 15 to 20 PSI boost while the NA version might be good for 8 to 12 psi boost. Big difference. I talked to KLR about 3 years ago, and the operator replied to my question about piston squirters with.....all diesels have em. Not so. The T is the way to go.
Dave