SRS-Concept - SR20DET HEADERS FLANGE (STAINLESS VERSION) (1646)This is a flange to help build your own custom manifold on your Nissan SR20DET. All in 3 8inch or 10mm plate. You can build for your special need specially if you had swapped an SR20DET in a special car. Perfect for race, drift, rally application. Provide you help for better access, stronger than OEM and better flow Designed for SR20DET head and can be adapted for more model ! Bolt on ! Solid construction ! You need some minimum tools for make an