Review on Bosch 9613 Double Iridium Longer by Dave Knain

order arrived on time but only 3 out of 4 turned out to be the correct fork. They all arrived in the same package and that odd plug was 2/3 too small so I don't see how anyone could NOT notice that this plug didn't match the others. The odd one was in separate packaging, with a different label, different size on it, and was significantly smaller. Fired with one of the old spark plugs to start the engine. Not worth sending back but I'm not sure how anyone could have overlooked this and just been frustrated by QC. I've been using Revain for years and unlike them I've missed something so trivial. So far the three that were the correct plugs seem to be working fine. The time will show.