KMS Blue Cam Seal for Honda & Acura Engines B16 B18 B20 Powder Coated Made with lightweight 6061 billet aluminum. CNC Machined in-house. Powder coated in blue with clear coat. Solves the that dirty problems Honda DOHC engines experience after years of service. OEM seals experience after years of service.s tend to crack, resulting in annoying oil leaks. A stylish dual o-ring design is guaranteed to seal and exceed OEM standards.