Thanks for your input. Firstly, how many set of Atomic Valve Springs have you heard of failing???? Or any other ones compared to Nizpro. As I said it's not only me, your a mod, use the search and see how many others there are. Then compare them to how many complaints there have been about Nizpro valve springs. The results will speak for themselves. I did speak to Nizpro. They said they had a bad batch and that it was sorted and I shouldn't be having problems with them. No offer to refund them or anything. First oportunity I got to change them I did. Any way like pitlane said they have other options, I was simply exercising the freedom to voice my opinion. Perhaps I might be foolish to think that I bought a quality product that should of never had a problem? I mean they are a complicated peice of equipment to manufacture ovcourse I should have expected them to have a problem or multiple problems like you say.