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View Full Version : Best pipe for os 91SZ-H PH-Hyper Ringed Heli Engine w/Pump

Street Flyer
02-21-2008, 08:46 PM
Anyway I want to know what pipe will produce the most power for this engine.
DavidH
02-22-2008, 09:17 AM
Hatori SB 18 or 19. Either one will work fine.

David