I save lots of info people post and some I measure myself. Like when I put the Howard's lifters in, I verified in my block the oil band was not near the top/bottom at max/zero lift. But I didn't write down an actual measurement, and getting between the cam and the bottom of the lifter bore, with the lifter in there, can be tough.

I really don't know what effect the large cut out will have on oil flowing from the oil galley around the lifter and out to the valley (clearance between lifter and bore). But there have been oil pressure problems reported with similar barbell lifters.

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I had about 8 mopar performace lifters do that over 3 ton 4 years! I used to carry spares and spare pushrods for road side fixes.

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I have used these lifters with some very aggresive lobes and havent had this happen. They obviously are not as strong as a one piece but should be strong enough. Here are few things that could cause this kind of failure.

1) Wrong pushrod radius, soild lifter pushrod ball tips have the larger 5/16" radius for solid lifters (hydraulic lifter pushrods have a 50% smaller radius).

2) Not enough valve spring open and seat pressures.

3) Excessive valve lash, should never allow more than about .006 larger than the cam manufacturers spec.

Good idea to run pushrods with enough diameter and wall thickness for your cam/ application.

After talking with Bullet Cams Rep., I returned the "dumbbell" lifters and received a 2 piece design, I hope these are better than the MoPar ones. Look like 94 grams. Anybody had an issue with these? They told me again, all lifters they sell come from HyLift/Johnson...Thanks for all responses.

Anybody use these?