Exhaust Eliminator pipe Fits: KTM RC 125 /250 / 390 models 2017-2020 KTM Duke 125 / 250 / 390 models 2017-2020 - Compatible with the OEM silencer/muffler and others that fit the original catalytic converter. - Eliminator Pipe Material: 304 Grade Stainless Steel - Black Widow Eliminator pipe weighs 770 Grams. - Increased potential with enhanced sound. - No modifications required. (Re-mapping, Power commander). Lambda sensor (O2 sensor) is located on the original front pipe which is retained and used with this upgrade. - Kit includes Eliminator Pipe and instructions. This kit requires the use of the existing OEM clamps and gaskets. - Two year Black Widow warranty.