Tearing down my Heads/Cam LS1, due to oil consumption in #7 Cylinder (hole in piston), and pulled a lifter to check condition. When I pulled it out (expecting stock LS1) I found these. They have the shrouded roller, like an LS7, so I know they are not LS1s, but the LS7 has a wire type retainer in the cup. These have a stamped type retainer. All help is appreciated!

-Dave

 

Maybe Comp lifters? I'm taking a shot in the dark I am not 100% sure.

 

I've seen these sold from a few people but don't know who is making them. Regardless of make, they're an OEM style lifter with a reduced travel sheet metal clip. These knock about .045" travel out of the lifter. They take the .045" out of the pushrod seat height, so you would need a longer than stock pushrod.