I'm with eric, the more stock parts in the garage the more high performance the garage becomes. I put my stock exhaust in there. BAM my garage is more quiet.
A/c from my truck, boom its cooler.. stock airbox=better airflow and easier breathing.. shocks and springs=softer floor and if u store stock headlights in the garage WHAMO better lighting.
That's how good stock parts are, not only do they increase performance of your car when installed, they also increase the perf of wherever they're placed when in storage.
I'm in my garage a lot so that where I want all my awesomeness to be stored.
Its simple really