Haha, I have been noticing that too. Aftermarket parts from Amazon or equivalent are starting to get better than some OEM parts. I still use OEM carburetor rebuild kit from Briggs or Kohler because I don't fully trust complete Amazon carbs. Are usually just use the new parts from the aftermarket one on the OEM carburetor shell. I wouldn't hesitate to buy a engine rebuild kit from Amazon. In fact, I've been thinking about doing a engine rebuild on a old 70s Honda horizontal shaft engine. I would use a Amazon rebuild kit.