If you look on the forge link, they have a photo of the two, you then need to check under the car to match. I have a 300 and mine is A but you really need to check.
Definitely 100% worth doing it transforms the car and when I done mine it was stock and on Continental’s and it got rid of the wheel tramping. Now the car is Revo stage 1 and on PS4s. You can do it yourself, but you will need a ramp and a torque wrench and the grease. But it is a lot easier to get a garage to do it for you.
I did mine myself and when I removed the bolt, the engine moved slightly, a few mm , but I then needed
help with a bar to get the engine back so the bolt would line up.