Cylinder Kits - +4mm Big Bore Comp Kit 488Cc

+4mm Big Bore Comp Kit 488Cc

• California Prop 65 Warning: Cancer and Reproductive Harm - https://www.p65warnings.ca.gov/
• UPC: 714205039474

The Cylinder Works +4mm Big Bore Comp Kit increases your engine displacement to 488cc with a 12.1:1 compression ratio. This direct bolt-on upgrade requires no machine work and is designed to match OEM appearance while improving performance and durability. The kit includes a nickel silicon carbide-plated cylinder for enhanced longevity, a matched Vertex piston kit to reduce engine noise, piston rings, pin, clips, and a complete gasket set. The cylinder is honed to precise specifications for easy installation, making this a convenient and effective upgrade for your Honda CRF450R (2002-2008).