Other than the obvious part number difference, can anyone tell me the physical differences between these two lifters.

Mechanical Roller Tappet Lifters
Mopar Performance P4452919 - Mopar Performance Lifters &
Components –for small block
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Mechanical Roller Tappet Lifters
Mopar Performance P4452920 - Mopar Performance Lifters &
Components – for B-RB-Hemi

They both have the V-shape cross bar and look identical. I'm just trying to figure out exactly which ones I have. Thanks for any help

8418283-P1010078.JPG (48 downloads)

Ronny
6.789 @ 198.63 **.956 Brand New 60'***
4.17@ 169 1/8th mile
John 14:6

https://www.youtube.com/watch?v=TUku_hjYRh8