{"product_id":"m18-oxygen-sensor-adapter-catalyst-core-off-road","title":"M18 × 1.5 Oxygen Sensor Extension Adapter with Mini Catalyst Core for Off-Road Check Engine Light Elimination | Lonoma","description":"\u003ch2\u003eKeep Your Off-Road Dashboard Clear During Exhaust Modifications\u003c\/h2\u003e\n\u003cp\u003eWhen you upgrade your exhaust system or remove emissions equipment for off-road performance, the oxygen sensor readings can trigger dashboard warnings. This threaded adapter installs between your O2 sensor and the exhaust port, housing a \u003cstrong\u003eminiature catalytic element\u003c\/strong\u003e that helps normalize sensor feedback. Built from \u003cstrong\u003ecorrosion-resistant stainless steel\u003c\/strong\u003e with an internal filter mesh, it's engineered for vehicles used exclusively in \u003cstrong\u003eclosed-course or private-property environments\u003c\/strong\u003e. The M18 × 1.5 threading fits most standard oxygen sensor ports, letting you complete installation with basic hand tools in minutes.\u003c\/p\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0990\/8129\/0112\/files\/0x1296_1686681616046_1800x1800_0120e7a7-d82c-46b4-a99b-4740aa9740e2.webp?v=1793735762\" alt=\"\" style=\"width:100%;max-width:100%;height:auto;display:block;margin:24px 0;\"\u003e\n\n\u003ch2\u003eWhy You Need This\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEliminates Nuisance Codes:\u003c\/strong\u003e Addresses P0420, P0430, and similar diagnostic trouble codes that appear after cat removal on off-road builds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Catalyst Core:\u003c\/strong\u003e Unlike hollow spacers, the internal mini-converter element works with sensor chemistry to produce stable readings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRust-Proof Construction:\u003c\/strong\u003e SS304 stainless steel body and woven mesh filter withstand heat, moisture, and exhaust gases without degrading.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool-Free Threading:\u003c\/strong\u003e M18 × 1.5 pitch threads match factory oxygen sensor ports—no drilling, welding, or custom fabrication required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLightweight Design:\u003c\/strong\u003e Weighs just 0.088 lb, adding negligible mass to your exhaust system while maintaining sensor position and clearance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOff-Road Legal Compliance:\u003c\/strong\u003e Designed exclusively for competition vehicles, farm equipment, and machines operated on private land—never for street use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eBuilt for Demanding Conditions\u003c\/h2\u003e\n\u003cp\u003eHigh-flow exhaust modifications expose downstream oxygen sensors to extreme temperatures and unburned fuel vapors, conditions that standard sensors interpret as catalyst failure. This adapter's stainless construction and internal catalyst element help stabilize those readings so your off-road vehicle runs without persistent dashboard alerts. Whether you're building a trail truck, a sand-rail, or a farm utility vehicle, the threaded design makes installation straightforward: unscrew the factory sensor, thread the adapter into the bung, reinstall the sensor into the adapter's female threads, and you're done. We ship free across the United States, and if it doesn't solve your check-engine concerns within 30 days, our return policy has you covered.\u003c\/p\u003e","brand":"Lonoma","offers":[{"title":"Default Title","offer_id":60309629600128,"sku":"SKU_1793735760273_591","price":29.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0990\/8129\/0112\/files\/0x900_1686681616025_1800x1800_03e9bc33-c03f-451f-85e2-9fff324f7bf3.webp?v=1793735763","url":"https:\/\/koossa.com\/products\/m18-oxygen-sensor-adapter-catalyst-core-off-road","provider":"Lonoma","version":"1.0","type":"link"}