Hello,
I'm trying to order a replacement fuel filter, yet there seems to be two dimensions available - one that is 108mm in length and 55mm in diameter, while the other one is 130mm in length and 74mm in diameter, both are from mahle and supposedly fit Jaguar X300 4.0...

Any clue which one is correct? Thanks!

 

Where are you getting confused? Just go to RockAuto, all of their fuel filters for your car are identically accurate. Buy one of those.