When i was in the process of buying my 240 they used bothe ECU's at that time. I duno if they figured out how to work with sr ecu just yet.. Also as a NEWBIE i wished i went to SS first. Xat only know bolt ons . 21,000 for a rb25 swap sound way to steep for me. Also i did get false info from XAT. I like adam and casey but they do not know tech info. They resort to other shops and general mechanics. I know i used to hang there when they where in clearwater. Good luck to who ever get a 240 /sr swap. I would definitly recommend Secret service god only know how much they hooked me up.