{"product_id":"isr-performance-3-turbine-outlet-o2-housing-nissan-sr20det-s13-s14","title":"ISR Performance 3\" Turbine Outlet O2 Housing - Nissan SR20DET S13\/S14","description":"\u003cp\u003eThe ISR Performance 3-inch Turbine Outlet O2 Housing is a high-flow replacement for the restrictive factory O2 housing on Nissan SR20DET turbos. Stepping up to a 3-inch outlet reduces post-turbine backpressure, helps the turbo spool more efficiently, and opens up the rest of the exhaust system for real flow gains. Double-welded inside and out with a brushed finish.\u003c\/p\u003e\n\n\u003ch3\u003eWhat It Does\u003c\/h3\u003e\n\u003cp\u003eThe factory O2 housing on the SR20DET is a known restriction point that bottlenecks even mild bolt-on builds. This ISR housing replaces it with a 3-inch outlet, which is the right size for a built SR running an upgraded turbo, larger downpipe, and 3-inch exhaust. Less backpressure on the turbine wheel means quicker spool and more usable power throughout the RPM range.\u003c\/p\u003e\n\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNissan SR20DET (S13 Redtop, S14 Notchtop, S14 Blacktop, S15)\u003c\/li\u003e\n\u003cli\u003eAny SR20DET swap into S13 or S14 240SX\u003c\/li\u003e\n\u003cli\u003eCompatible with the factory 3-bolt turbine outlet flange\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eImportant clearance note:\u003c\/strong\u003e The 3-inch outlet diameter is larger than stock and may require minor clearance work or modification near the bell housing, transmission tunnel, or downpipe flange depending on your specific chassis and transmission combination. Always test-fit before final installation.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n\u003cp\u003eReuses the existing stock turbine housing studs and nuts. No additional hardware needed on the turbo side.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1x ISR Performance 3-inch turbine outlet O2 housing\u003c\/li\u003e\n\u003cli\u003e3x Studs (M10 x 1.5, 1-3\/4 inch length)\u003c\/li\u003e\n\u003cli\u003e1x 5-bolt gasket\u003c\/li\u003e\n\u003cli\u003e1x 3-bolt gasket\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eProduct Details\u003c\/h3\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eBrand:\u003c\/strong\u003e ISR Performance\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e IS-O2-SR3IN-w\/adpt\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eType:\u003c\/strong\u003e Turbine Outlet \/ O2 Housing\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eEngine Fitment:\u003c\/strong\u003e Nissan SR20DET (all variants)\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eOutlet Diameter:\u003c\/strong\u003e 3-inch\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eTurbo Side Flange:\u003c\/strong\u003e Factory 3-bolt SR20DET\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eStud Thread Pitch:\u003c\/strong\u003e M10 x 1.5\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eStud Length:\u003c\/strong\u003e 1-3\/4 inch\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eConstruction:\u003c\/strong\u003e Double-welded inside and out\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eFinish:\u003c\/strong\u003e Brushed\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eClearance:\u003c\/strong\u003e May require minor modification for bell housing or downpipe clearance\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eHardware:\u003c\/strong\u003e 3x studs and gaskets included; reuses factory turbine housing nuts\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eSold:\u003c\/strong\u003e Individually\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eLegality:\u003c\/strong\u003e Off-road and competition use only\u003c\/p\u003e","brand":"ISR Performance","offers":[{"title":"Default Title","offer_id":45957136351429,"sku":"IS-O2-SR3IN-w\/adpt","price":134.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/2718\/9701\/files\/1__37296.1630073049.500.659.jpg?v=1773346515","url":"https:\/\/www.isrcompetition.com\/products\/isr-performance-3-turbine-outlet-o2-housing-nissan-sr20det-s13-s14","provider":"ISR Competition","version":"1.0","type":"link"}