DescriptionCRF450X Block Off KitThe CRF450X Block Off Kit (for model years 2005-2018) is designed to eliminate the vacuum pump (or smog pump), which is located behind the right radiator. Unlike most kits, it is specifically created for the CRF450X to completely block the air passage in the exhaust port. They are purposely not color anodized, so as not to attract attention and keep a stock look.
