4-450 Dog (with spring fingers, old style)

Compatibility/Design Change Notes:

4400SS: This part fits the ORIGINAL 1-4400 Housing
If your housing is numbered 1N-4400 or 1P-4400 on the inside, OR has the slot on the dog post for the c-clip, you need the newer part number 4N-4400.

4500SS: This part fits the ORIGINAL 1-4500 Housing
If your housing is numbered 1N-4500 or 1P-4500 on the inside, OR has the slot on the dog post for the c-clip, you need the newer part number 4N-4400.

5500SS: This part fits the ORIGINAL 1-5500 Housing
If your housing is numbered 1P-5500 on the inside, OR has the slot on the dog post for the c-clip, you need the newer part number 4N-4400.

550SS: This 4-450 dog can be subbed for the original 4-550 dog.