Quote Originally Posted by Fbody383 View Post
They do work... until they don't. Hate to hear it - but I'm with you, why can't things just work cheaply for a long time.
They do work cheaply for a long time, after lots of expensive trial and error.

Even my car had a random misfire come back up last week at idle, after it had already dyno-ed and driven some with zero issues. It was the primary coil->opti wire's insulation itself being slightly cracked. I could hear it arching in the engine bay this time. No clue how that happened. Going through and rechecking every plug wire again to be safe.