* Interchange Part Number:234-9124, Downstream / 234-4350 Downstream * Fitment For:2006-2015 Honda Civic 1.8L L4 * [Easy Installation]:Plug and Play design for direct replacement and ease of installation,Performs as well as or better than OE * [Service Guaranteed]:If you have any questions, contact with us, we will reply you in 24 hours and offer the solve way for you.