my friend crashed his brand new acura rdx not too long ago and now its total (hes alive by the way with no injuries). but his motor is in brand new conditioned and i was thinking if i should buy his motor and install it in my crx. will it fit?

Yes, it will fit, but it will also be illegal if you live in California.

In my opinion you should not go for it. Dont do this.

Acura RDX 2007 Acura Performance Chip (http://www.engineperformancechip.com/acura-performance-chip-c-868)