Made from 304 stainless steel for maximum corrosion resistance. The nicest collector adapters available! These are TIG welded for strength and durability. Come with 3-1/2" 3 bolt flange and a 3-1/2" OD outlet. An O2 bung is welded into the tubing, space approximately 2" from the inside edge of the flange. This collector adapter comes with a limited lifetime warranty and proudly made in the USA.
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