A vacuum reserve canister captures an extra shot of vacuum from your engine for your power brakes. The COMP Cams Vacuum Canisters are for cars equipped with big cams and power brakes.
Providing the best sealing properties and spring clearance, viton valve seals are an excellent choice in performance applications. The 520 seal has a .575" OD and fits applications with 5/16" valves and .530" OD guides.
Available in a set of 8 under 520-8, available in a set of 12 under 520-12, available in a set of 16 under 520-16
Engines w/ 0.530" OD Valve Guides and 5/16" Valve Stems
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