A guy on one of the boards has some new OEM GM lifters for sale. He says they are a brand new design based on the GENIII ls1 technology and is a composite structure. Supposively its lighter and stronger and is meant for higher lift cams like the hot cam. They still fit in the stock retainers too.
Any truth to this. Have you heard of these? I emailed him for the part number, he should be sending it to me but I wanted to get some info from anyone who's heard of these.

 

well i found a site where a guy put some "new design lifters" in his 94 z28 so i guess they are legit.

Does anyone know how good they are compared to comp R's

the gm part number is 12371042

 

12371042 is not a part number for a lifter but for an install set made up of the following:

This roller lifter kit is used on all late model V8 blocks 1986 and newer. These second design lifters are used in late model 350 HO engines and use a higher checkball spring preload. This kit includes 16 of P/N 17120735 roller lifters, 8 of P/N 12550002 valve lifter guides, one of P/N 14101116 valve lifter guide retainers, 4 of P/N 24501365 retainer bolts, and 4 of P/N 120386 retainer washers.

The lifters of this kit have been around for a while.