LEGO MOC V2 pneumatic engine by Stinkwell_exhaust_creations | Rebrickable - Build with LEGO
Lego Technique: Pneumatic system
pneumatic_web_tut [DASL Wiki]
How To Make a Lego Technic V2 Pneumatic Engine - YouTube
Build 19 Piece Pneumatic Kits with Technik Parts Contains Air Pump, Piston Pressure Rod, Cylinder,Pneumatic Hose &More,Great for DIY, MOC Tech, Compatible with Lego