FMF Factory 4.1 Muffler 044206 1831-0356 Shifter Shaft with an aggressive look &

with an aggressive look & sound

Offers an upgrade to a full system when used with an Akrapovic Slip-On exhaust system

Patent-pending seal design and special elastomer has 1/3 of the stiction and up to four times the life of an OEM seal

Rails are 3/4" diameter and mount directly to stock OEM saddlebag guards

FMF Factory 4.1 Muffler 044206 1831-0356 Shifter Shaft with an aggressive look &If performance is your priority, the Factory 4. 1 is the exhaust for you Used by Factory teams such as KTM, Epic Can Am and Rath Racing Accepts optional quiet inserts and spark arrestors For use with FMF Powerbomb, FMF Megabomb, or stock header