i've had the HO kit for a little over a year, car runs much better with these coils but I had 2 weak oem coils. this past july one of my 034 HO coils failed, coil at cylinder 1. 034 was fast to ship me another coil for $70, never yet have I seen a warranty refund for the replacement coil I bought.
also found recently that if you wrap the too long plug wires under the coil cover they arch on each other which can cause misfire and harm to the coils, I think this may be how my coil failed. I can see white markings on the plug wires where they had arched
otherwise they work great