Factory 4.1 MIni System

Select your bike:

from $


We take fun seriously so we built the Mini Factory 4.1. This is an all out performance exhaust for play bikes. With the Mini Factory 4.1, you will be the king of backyard motocross and look great doing it!

  • Superior power on stock and big bore motors
  • Choose between titanium and stainless steel header
  • Customize with tuning inserts and spark arrestor

Free ground shipping on web orders over $250 (USA excluding AK and HI)

©2014 FMF Racing. All Rights Reserved. Privacy & Legal