I'll go look tomorrow when I get to the shop; off the top of my head, I only remember colors. I know that the 86 turbo has an ECU with a blue bosch label, and a normally aspirated 86 takes one with a yellow label, and a 90 740T takes one with a black label, and a 90 740 normally aspirated takes one with a pink label, UNLESS, the blasted ECU has been replaced RECENTLY by a new one from Volvo, and then the colors will be different. The only one I remember is the 89-95 normally aspirated, and that color just changed to brown. Anyhow, I'll get numbers tomorrow. From what Al says, I'd say to diddly with it. If it isn't broke; don't fix it. The air mass meters look so similar that someone, most likely, just put one on that "looked" right, and didn't check numbers. Truly, I dunno...

Chris