This is a 1/2" muffler extension for .40-.46 size engines such as O. S. MAX, ASP, Magnum and Thunder Tiger. This goes between the engine and muffler, bringing the muffler outside the fuselage.
This extension will fit any engine that has the same exhaust port dimensions
as the O. S. .40-.46 SF engine: ASP .46, Royal .46, Thunder Tiger Pro .40-.46,
and the Magnum XL .40-.46.
(1) 1/2" aluminum muffler extension
(2) 3 x 50mm cap head screws
Technical Distance between centers of mounting holes: 36mm(1.419")(about-1-3/8").
Exhaust port 30mm(1.184")(about-1-3/8") x 8mm(0.321")about-5/16"