Im thinkin about gettin a PLX Gauge for xmas and a pod. Ive got 2 questions, well actually 3 lol.

1. Which gauge setup do I need to get? Just the DM-100 that plugs into the ODBII? or would I need to get the SM-AFR/DM-100 Combo?

2. Im wanting that guage pod that fits directly into that slot in the dash where the passenger airbag activates, but I have an 06 so I have that empty slot that needs to be used. Do yall know where to get the pod or insert? 52mm or 60? Cause I want to get the 60mm Gauge

3. Cheapest place to buy em? I guess PLX's website..