definitely keep your parts if you have a place to store them. When I parted ways with my G37, my partout was completely done in under 12 hours, and sold the car itself 2 days later. I cannot tell you the amount of stress you will avoid instead of having to feel like you have to track down cheap "oem parts", spend more money on them then you most likely sold your originals for, and trying to make sense of a partout as you're literally spending money to sell your aftermarket parts.

 

I've learned from previous cars that I've moded that it is extremely a smart idea to keep all OEM parts that you change out. If you ever plan to sell the car or part out the car you won't have to spend a dime or source any of the oem parts. It's truly a hassle...