Key Features • Mini catalytic converter O2 sensor adapters• Designed to assist with emission compliance solutions• Available in Euro 3 and Euro 4 emission specifications• Available in straight, 45 degree and 90 degree configurations• Compact design for tight installation spaces• Commonly used with modified exhaust systems Looking to turn off that pesky Check Engine Light caused by a faulty catalytic converter or high-flow aftermarket converter? Look no further than Racecrafts Mini-Cat 02 Adapters! Our easy-to-install adapters feature a metallic core catalytic substrate, providing an additional catalyst for your exhaust system and helping to turn off that dreaded CEL (Check Engine Light).Simply unscrew the rear 02 sensor from the catalytic converter causing the CEL code, screw in the Mini-Cat, and re-fit the 02 sensor into the adapter. It's like a double adapter, but better!Our Mini-Cat Adapters feature the OEM thread size of M18 x 1.5, and are exclusively for post-cat sensors. Don't let a faulty catalytic converter slow you down. Get back on the road with Racecraft's Mini-Cat 02 Adapters today!