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The Kooks 4" collector gasket is a 3-bolt style carbon composite exhaust gasket intended for 4" collector openings and sold in pairs. It features a single 4" opening with three bolt holes to match standard collector flange patterns. Use these gaskets as direct replacements for damaged or missing collector seals; they provide a compressible interface between 4" flanges to maintain an exhaust-tight joint in custom or replacement collector installations.
Kooks Universal 4in Coll Gasket 3 hol
