Genuine GM part, for 1.8 petrol engines X18E1, Z18XE Z18XEL.  

Please don't be put off by the low feedback - I have been selling on ebay for many years and have 20,000 + feedback on my main business ID for Rover and Jaguar parts - XJRover (feel free to check). This is a newly set up ebay ID for parts relating to other marques and a few personally owned items.