Basic
filter and regulator (For clean controlled air)
Tire chucks, blow gun, (basic stuff)
IR 231 (or similar) 1/2 impact (must have) Mine is a Napa copy, #6-231
1/4 air ratchet (useful for trans pans, limited access) Mine is a compact napa branded ratchet, dont rember the PN# /3rd the size of my brothers S-O FAR25
1/4 die grinder (cleaning, grinding,deburring,ete...)
Air hammer ( I like using a hammer head bit for alot of differnt things)
Add as needed
Air drill (more compact than a electric drill)
90* air drill (nice for drilling exhaust bolts& tight spaces)
90* 1/4 die grinder (tight spaces and probably roloc disks)
cut-off tool (for cutting things)
3/8 impact (useful but 1/2 is more so, IMO. more compact)
Lincoln 1162 grease gun (best air operated grease gun available)