C4.1 to c4.2 lower pin mounts

[J.Gonzalez]

Are the c4.2 rear arm mounts direct replacment for c4.1?

Not sure if the drill pattern for the holes is the same.

[wezzer]

hi
no! they are different.

[Big G]

No they are different.
The C4.2 mounts take a bush rather than the hinge pin direct.