ISR O2 SAND CAST TURBINE OUTLET NISSAN 240SX SR20DET S13/S14 1989-1998

Factory Nissan SR20DET O2 housing are extremely restrictive, ISR Performance Cast 3″ O2 Housing are substantially larger allowing the exhaust to flow more efficiently compared to stock ISR Performance Cast O2 Housing is a true 3″ O2 housing as Most other O2 housings are 2.7″.

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