
Header Collector Gasket Collector 3 in Thick is exhaust-system connection hardware used to seal or adapt tubing at a header/collector joint. These joints see high heat and repeated expansion cycles, so the correct diameter, flange style and gasket/adapter geometry are critical to preventing leaks and keeping the exhaust aligned.
Match the listed collector or pipe diameter before installation and verify the joint is fully supported. After initial heat cycles, recheck accessible fasteners for proper tightness if the exhaust manufacturer recommends it.