Backed by ATV legend Mike Penland, the Penland Series was developed for serious off road racers and trail riders striving to achieve more low end torque. The Penland features the same core as the Performance Series, but features the removable TRM that allows quads to hook-up in rough conditions.

• The Torque Range Modifier adds more bottom-end torque for rough conditions.
• Depending on the model, you can expect a 4-6 dB increase over stock.
• The Penland Pro uses a 2 1/8" non-restrictive core for maximum flow.
• USFS Approved: All HMF offroad exhausts come with a USFS approved spark arrester.
• Two Year Warranty: HMF Engineering Inc. warranties all exhaust systems for two years from the date of purchase for all manufacturing defects.

The Torque Range Modifier adds more bottom-end torque for rough conditions.HMF Engineering