Warning: the guy at the parts counter in Toledo sold me the wrong injector seals and swore they fit
I drove 40 minutes to grab a set of injector O-rings for a 6.0 Power Stroke at a shop off Airport Highway and the kid behind the counter handed me a box without even checking the year. Got the rail pulled apart in my bay, popped one on, and it was loose enough to spin, so I walked back in with the old seal in my hand and he just shrugged and said "they all look the same to me." How do you handle it when a counter guy won't own the mistake and you're already up on jack stands?