There is a fair bit of debate about Yellow Jackets vs Splitfires, I know a Martin has used Yellow Jackets for a few years in his car with no problems, I had one of my Yellow Jackets shit itself in about 2 months but it was replaced with no questions asked. I also know of a Splitfire coil giving out after a couple of months. It's up to you mate and also seems a little luck of the draw.