GPR Exhaust - Albus Evo4 Slip-On for Ducati Monster 821 - 2017 to 2021 Muffler with:dB Killer-Link Pipe-Catalyst Difference between Mile and Phase

Difference between Mile and Phase is that Mile is slightly smaller compared to Phase and fits smaller faces/helmets better

The hexagonal anti-roll feature prevents any bothersome rolling away at the workplace

Even hand guards were originally reserved exclusively for enduro riders

With its 100% waterproof

GPR Exhaust - Albus Evo4 Slip-On for Ducati Monster 821 - 2017 to 2021 Muffler with:dB Killer-Link Pipe-Catalyst Difference between Mile and PhaseGPR's ALBUS silencer series has an aluminum body and CNC machined Avional Caps. The exhaust has a ceramic treatment, that can withstand high temperatures. It has an elliptical shape with measurements of 90 x 120 mm. Product Features SOUND: Upgraded sound from stock exhaust PERFORMANCE: Upgraded performance from stock exhaust QUALITY: Italian made with high grade welding WEIGHT: Lighter than stock exhaust Technical Specifications Shape: Oval Body