This is a Bolt-Through Muffler from Macs for the
OS .91 FX, Magnum .91 Pro and the ASP .91 engines.
FEATURES: Black aluminum construction
One piece construction
Ready for Macs New Smoke System
INCLUDES: One Muffler w/ pre-installed pressure fitting
Two Muffler screws (8-32 x 1.875")
REQUIRES: Thread-locking compound to keep screws tight
SPECS: Overall length: 8.25" (291mm)
Length from center of exhaust port to end of muffler: 6.50" (165mm)
Body Diameter: 1.50" (38mm)
Exhaust Port Opening: 1.10" x .35"
(28mm x 9mm)
Width between mounting hole centers: 1.65" (42mm)
COMMENTS: Bolt-Through means that the screws go through the engine and
screw into the muffler.