Before you do, I had a quick look at the same parts for my car on eBay - came up with results from J&R - is this the same company you got yours from? pics looked the same.
I thought I'd do a bit of sleuthing and have found less than glowing reports on their website - granted most people are going to complain when things go wrong, but a few comments about poor customer service on failures.
Makes me think that on such a critical part, I'd be leaning towards parts from a known manufacturer - but that's just me!
Posting from my phone - excuse spelling mistakes