ATV Exhaust

New and Improved Model- 5″ Long
(Fitment for All HMF Exhaust Pipes, please note: recommended that you use the HMF USFS spark arrester at the same time. )
The HMF Quiet Core Is an Insert Made of 1010 Steel and Installs on Most HMF Exhausts in Seconds. It Is Designed for Sound-Sensitive Riding Areas and Decreases the Sound Level Approximately 3-6 dBs.
The Quiet Core Will NOT Work With HMF Ecosystem or Quiet Race Series Exhausts Because These Models Have Mechanical Cores With No Room to Fit the Quiet Core Into the Exhaust
You CANNOT Use the Torque Range Modifier at the Same Time as the Quiet Core – Only One Can Occupy the Exhaust Space