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This is a Bolt-Through Muffler from Macs for the
OS .91 FX, Magnum .91 Pro and the ASP .91 engines.
Black aluminum construction
One piece construction
Ready for Macs New Smoke System
One Muffler w/ pre-installed pressure fitting
Two Muffler screws (8-32 x 1.875")
Thread-locking compound to keep screws tight
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)
Bolt-Through means that the screws go through the engine and
screw into the muffler.
– If you need more information, use these Macs resources –