{"product_id":"90-degree-o2-sensor-spacer","title":"90° O2 Sensor Spacer — Mini Cat CEL Fix for P0420\/P0430 (M18x1.5) | Brockett Built","description":"\u003ch2\u003e\u003cstrong\u003e90 Degree O2 Sensor Spacer — Mini Catalytic Converter CEL Fix\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eBrockett Built 90° O2 sensor spacer\u003c\/strong\u003e (also called a mini catalytic converter spacer, O2 defouler, or bung extender) eliminates \u003cstrong\u003eP0420 and P0430 check engine light codes\u003c\/strong\u003e caused by low catalyst efficiency — a common issue after installing \u003cstrong\u003eheaders, high-flow cats, or a catless mid-pipe\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eMachined for a precise \u003cstrong\u003eM18x1.5 thread\u003c\/strong\u003e (standard O2 sensor thread) and built to survive full exhaust temps. Ships same or next business day from Texas.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e🔥 Key Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eFixes \u003cstrong\u003eP0420 \u0026amp; P0430\u003c\/strong\u003e (catalyst efficiency below threshold) codes\u003c\/li\u003e\n\u003cli\u003eWorks with \u003cstrong\u003eheaders, high-flow cats, and catless setups\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eRestores smooth idle and eliminates false CEL trips\u003c\/li\u003e\n\u003cli\u003eHelps pass emissions readiness (where applicable)\u003c\/li\u003e\n\u003cli\u003eQuick, bolt-on install — no tuner or ECU flash required\u003c\/li\u003e\n\u003cli\u003eCNC-machined, stainless internal, full-temp rated\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003e🚗 Confirmed Fitment\u003c\/h2\u003e\n\u003cp\u003eFits \u003cstrong\u003eany vehicle with an M18x1.5 downstream O2 sensor\u003c\/strong\u003e, including but not limited to:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLexus GX470 (2003–2009) — 4.7L 2UZ-FE\u003c\/li\u003e\n\u003cli\u003eLexus GX460 (2010+) — 4.6L 1UR-FE\u003c\/li\u003e\n\u003cli\u003eToyota 4Runner V8 (2003–2009) — 4th gen\u003c\/li\u003e\n\u003cli\u003eToyota 4Runner V6 (2003+) — 1GR-FE\u003c\/li\u003e\n\u003cli\u003eToyota Tundra \/ Sequoia \/ Land Cruiser (2UZ \/ 3UR \/ 1UR)\u003c\/li\u003e\n\u003cli\u003eToyota Tacoma (2005+) — 1GR-FE \/ 2TR-FE\u003c\/li\u003e\n\u003cli\u003eFJ Cruiser (2007–2014)\u003c\/li\u003e\n\u003cli\u003eMost Honda, Nissan, Subaru, Ford, GM, Jeep, and Ram gas engines with M18x1.5 O2 threads\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eNot sure if your vehicle fits? Message us with your year\/make\/model and we'll confirm.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e⚙️ How It Works\u003c\/h2\u003e\n\u003cp\u003eThe 90° spacer threads into your factory \u003cstrong\u003edownstream (rear) O2 sensor bung\u003c\/strong\u003e, then the sensor threads into the spacer. The offset geometry and internal restrictor slow the exhaust gas reaching the sensor tip, letting the rear O2 read a \"clean\" signal — so the ECU stops throwing catalyst-efficiency codes.\u003c\/p\u003e\n\u003cp\u003eThis is the fix when:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRunning \u003cstrong\u003elong-tube or shorty headers\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eRunning a \u003cstrong\u003ecatless mid-pipe or test pipe\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eUsing \u003cstrong\u003ehigh-flow catalytic converters\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eDealing with an \u003cstrong\u003eaging OEM cat\u003c\/strong\u003e that still functions but trips codes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003e🚨 Supported OBD-II Codes\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eBank 1:\u003c\/strong\u003e P0420, P0421, P0422, P0423, P0424\u003cbr\u003e\n\u003cstrong\u003eBank 2:\u003c\/strong\u003e P0430, P0431, P0432, P0433, P0434\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e🔧 Installation\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eInstall on \u003cstrong\u003erear (downstream) O2 sensor ONLY\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDo NOT\u003c\/strong\u003e install on upstream\/front sensor — it will cause driveability issues\u003c\/li\u003e\n\u003cli\u003eThread spacer into existing O2 bung, then thread sensor into spacer\u003c\/li\u003e\n\u003cli\u003eAnti-seize on threads recommended\u003c\/li\u003e\n\u003cli\u003eTighten snug — \u003cstrong\u003edo not overtighten\u003c\/strong\u003e (25–30 ft-lbs)\u003c\/li\u003e\n\u003cli\u003eClear codes with an OBD-II scanner and drive a full readiness cycle\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003e⚠️ Important Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eV8 \/ dual-bank vehicles need 2 spacers\u003c\/strong\u003e (one per bank)\u003c\/li\u003e\n\u003cli\u003eInline-4 \/ V6 single-bank vehicles need 1 spacer\u003c\/li\u003e\n\u003cli\u003eDoes \u003cstrong\u003enot\u003c\/strong\u003e repair a physically failed catalytic converter\u003c\/li\u003e\n\u003cli\u003eDesigned for \u003cstrong\u003emodified \/ off-road use\u003c\/strong\u003e — check local emissions laws\u003c\/li\u003e\n\u003cli\u003eO2 sensor itself must be in working order\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003e❓ FAQ\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWill this clear my P0420 code?\u003c\/strong\u003e\u003cbr\u003e\nYes — if the code is caused by low catalyst efficiency after headers, catless pipes, high-flow cats, or an aging cat. It won't fix codes caused by a bad O2 sensor itself or an exhaust leak.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need one or two?\u003c\/strong\u003e\u003cbr\u003e\nV8s and other dual-bank engines need two (one per bank). Single-bank engines need one.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat thread size is this?\u003c\/strong\u003e\u003cbr\u003e\nM18 x 1.5 — the industry-standard O2 sensor thread used on virtually every gas OBD-II vehicle.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it work with wideband O2 sensors?\u003c\/strong\u003e\u003cbr\u003e\nIt's designed for the narrowband downstream sensor. Do not install on a wideband tuning sensor.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it affect fuel economy or performance?\u003c\/strong\u003e\u003cbr\u003e\nNo — the downstream sensor only monitors cat efficiency, it doesn't control fuel trim. Your tune is unaffected.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow fast does it ship?\u003c\/strong\u003e\u003cbr\u003e\nSame or next business day from Texas, USPS First Class.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cem\u003eDesigned and machined in-house by Brockett Built. Backed by our 30-day fitment guarantee — if it doesn't fit or doesn't clear your code, we'll make it right.\u003c\/em\u003e\u003c\/p\u003e","brand":"Brockett Built","offers":[{"title":"Default Title","offer_id":44980890140880,"sku":null,"price":42.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/0818\/6832\/files\/O19A1256.jpg?v=1775660662","url":"https:\/\/brockettbuilt.com\/products\/90-degree-o2-sensor-spacer","provider":"Brockett Built","version":"1.0","type":"link"}