Originally Posted by whiskey

I had trouble getting one of these a couple of months ago, a lot are listed for s2 but I believe there s1, smaller thread. I got one off eBay in the end, was the only one that was listed correct. Even euro car parts list them, but there wrong!
That one in your link looks correct to me mate, and off a company like that I'm sure it is.
I found it a pain to change too