Macs Bolt-Through Muffler O.S. 91FXTower Stock# LXNUP4 • Manufacturer Stock# 6980
OS .91 FX, Magnum .91 Pro and the ASP .91 engines.
Black aluminum construction
One Muffler w/ pre-installed pressure fitting
Thread-locking compound to keep screws tight
Overall length: 8.25" (291mm)
Bolt-Through means that the screws go through the engine and