The Morel produced lifters are used by lots of cam manufacturers. In addition to those mentioned, Bullet cams and Ultradyne also use the Morel lifters. I have had one single lifter that would not oil through the seat like the other 15. We always prime the oiling circuit and verify a complete oil path. This one lifter had some internal issue. I could not take it apart to see what exactly was wrong. The riveted tie bar would not allow the plunger to be removed for inspection. They replaced the lifter without question and no other issues..
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