Blue spring kit 2003-2007 powerstroke
I ordered the blue spring kit for the 2003-2007 6.0 powerstroke. it leaked and the adjustable jam nut kept coming loose causing my fuel pressure to constantly change. i removed it, cleaned it all and made sure all seals were correct, still nothing but issues. i tried to reach out to sinister diesel about this but they were no help. EDIT- sinister diesel finally reached out to me and was willing to work with me. I exchanged the adjustable version of the blue spring kit for the standard version. It works great, like it should and I am much happier now. I changed my review from one star to three. I do think sinister diesel has good products, I just wish they were more willing to work with customers without customers having to leave bad reviews.