Pulled these out of my ls1, from doing some searching it looks like them may be the ls7 lifters?
I'm swaping in a 5.3 truck motor and the lifters I pull out of it look excatly the same but don't have the part number in them?
Thanks in advance.

 

Just a standard GM lifter. Commonly referred to as an "LS7" lifter around the forums. Nothing special or different than a "LS1" lifter. Only difference is the open wheel configuration.

ETA: Part# 17122490

 

Gothca thanks

 

How are these lifters different?

gm 12499225

 

Here is the comparison with LS1 and LS7 lifter.

 

I just grabbed one of the boxes off my desk...which happens to have quite a few different Delco boxes. The 1st number I listed was for a single lifter. The number you listed is for a set.