Kwiksen 2pcs Upstream Downstream Oxygen O2 Sensor 234-4098+234-4733 Universal Heated Sensor 1 and Sensor 2 for 1999-2000 Honda Civic 1.6L Only D16Y8 Engine PART NUMBER:234-4098 and 234-4733 Only fit D16Y8 Engine; For 1999-2000 Honda Civic 1.6L. Length 234-4099: 450 mm (17.71 inch), 234-4733: 350mm(13.77 inch) This is Brand New & High Quality Aftermarket Product service with Laser weld and Viton sealing system. Meet the professtional specification as OEM parts, for stable performance & durable Please check the description or use the year/make/model drop down bar and interchangeable part numbers to confirm the compatibility before purchase