Used RoadsterSport exhaust header for manual transmission 1.6 liter engine Early NA Mazda Miata. This exhaust header mounts to the cylinder head on the engine. RoadsterSport's exhaust header is made from 304-stainless steel. The design of the header is a 4 into 1 style. This header has a large diameter 1.5” OD tubing for the primary tubing which collects into 2" OD secondary tubing. Two O2 sensor bungs are built into the header with one right after the merge and another further downstream by outlet flange. The second O2 bung can be used for a wideband sensor. Part number 61-3253. Fits 1990-1993 with manual transmission only.
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