UK customers - please note this silencer is not road legal in the UK and will be marked Not for Road Use Header - Full Power / OEM Compatible Fits: CRF 250 L/LA Rally 2017-2020 - Full power, free flowing down pipe. - OEM Compatible, Mounts in the same position as the standard header. - Accepts original and aftermarket CRF250 L silencers / mufflers. (Same connection diameter, angle and position as OEM) - This is a plug and play item, no modifications required. - 304 Grade Stainless Steel. - 2 Year Black Widow Unlimited Mileage Warranty.