SS304 stainless steel holds up to extreme heat without issue.







Oxygen Sensor CEL Eliminator Adapter M18 x 1.5 Thread for Modified Exhaust Systems Off-Road Racing Vehicles Track Cars | Lonoma
Clear That Dashboard Warning for Off-Road Performance
When you upgrade your off-road vehicle's exhaust or modify emissions components for track use, dashboard warning indicators can become a constant distraction. This oxygen sensor adapter with integrated mini catalytic converter technology addresses false sensor readings on modified exhaust systems. Precision-engineered with M18 x 1.5 threads for secure installation, it features SS304 stainless steel construction that resists corrosion in harsh conditions. The internal filter mesh ensures consistent performance, while the compact 1.4 oz design adds negligible weight to your setup. Designed exclusively for closed-course competition and off-road applications where emissions equipment has been legally removed.

Why You Need This
- Integrated Mini Cat Technology: Built-in catalytic element processes exhaust readings to prevent false sensor alerts on modified systems.
- Corrosion-Resistant Build: Medical-grade SS304 stainless steel withstands extreme heat cycles and moisture without degrading over time.
- Direct Threading Installation: M18 x 1.5 metric threads match standard sensor ports for tool-free hand installation in minutes.
- Lightweight Performance: At just 1.4 ounces, this adapter won't affect your vehicle's power-to-weight ratio or handling characteristics.
- Competition-Ready Design: Purpose-built for racing applications, track days, and off-highway use where emissions regulations don't apply.
- Universal Compatibility: Standard threading fits most performance vehicles with oxygen sensor ports requiring M18 x 1.5 adapters.
Built for the Track
Whether you're building a dedicated race car, prepping for weekend track events, or maintaining an off-road competition vehicle, this adapter solves a common challenge faced by performance enthusiasts. The stainless steel filter mesh maintains optimal exhaust flow while the internal catalytic element ensures your vehicle's computer receives appropriate sensor feedback. Installation requires no special tools—simply thread the adapter into your sensor port by hand until snug. Remember, this component is manufactured exclusively for closed-course racing and off-road use where applicable emissions laws permit modifications. Your order ships free anywhere in the continental United States, and we back every purchase with our 30-day return policy for your complete confidence.
Free shipping on every order, with no minimum purchase.
Every order is carefully packed and shipped with full tracking, so you always know where your package is.
Order today and we'll ship it out the next business day.
Not quite right? You have 30 days to send it back, no questions asked.
We also back every product with a 2-year warranty against manufacturing defects, because we stand behind what we sell.
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What Our Customers Say
Discover what makes LONOMA special.
The M18 x 1.5 threading makes installation straightforward.
Integrated mini cat technology processes exhaust readings to eliminate false dashboard alerts on modified systems.
At just 1.4 ounces, this adapter adds virtually no weight while the internal filter mesh maintains consistent exhaust flow.
Precision-engineered for track cars and off-road racing vehicles where emissions equipment has been legally removed for competition use.
The corrosion-resistant stainless steel construction withstands harsh conditions and repeated heat cycles, while the compact design threads directly into standard sensor ports without special tools.
Purpose-built for closed-course racing applications, this adapter features medical-grade SS304 material and an internal catalytic element that addresses sensor readings on performance exhaust setups.
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Every piece is checked, carefully packed and shipped with full tracking, so it arrives exactly the way it should.
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