Details
They deliver solid power output and add a distinctive tone to the unmistakable throaty roar of the L Twin-cylinder engine. Kit includes dedicated control unit. **Fits bike models: Monster S4R S Testastretta 2007, Monster S4R S Testastretta 2008, Monster S4Rs 2006, Monster S4R Testastretta 2007, Monster S4R Testastretta 2008