Quiet Core Exhaust Insert - 1-1/4"

Tune exhaust sound and power and reduce exhaust sound by 1 to 6 dB’s. Work on DG O-series, RCM II, R.A.C.E. and Universal Slip-ons only. Easy to install by removing rear end cap and placing insert in front of spark arrestor. For "O" and "R" Series mufflers.