over the years my experience with accel was a melted HEI distributor cap, had 2 friends try it around the same time to the same result. plug wires with high resistance right out of the box. A HEI supercoil that lasted almost 2 days, the replacement lasted a week. that being said, I don`t use there products anymore. Any electrical product will have failures, it`s just that other companies products didn`t fail on me multiple times on multiple pieces like Accels stuff did. I just thought maybe they had a quality control issue, but I dunno, I do know they make a nice profit for a company that sells low quality parts, I`ve used pertronix without issues other than 1 bad coil, the replacement is still in use, MSD has served me well, I had one module fail me of theres, the replacement still works. I haven`t tried Jacobs, or mallory. I`ve pretty much stuck to pertronix and MSD.