Exhaust Silencer Kit Fits: CRF 300 RALLY 2021-2023 - Ultra lightweight race specification. This kit weighs just 2.6kg. - This is a plug and play item, no modifications required. - Designed to maximise your CRF300. - TIG welded for smoother internals, reduced internal turbulence. - Designed to fit the OEM header and our own Black Widow header - Pipework material: 304 Grade Stainless Steel. - Silencer material: 304 Grade Brushed Stainless Steel. - Silencer length: 300mm - Silencer code: UN30H - Silencer fitted with a removable baffle - Two year Black Widow warranty.