i am looking into purchasing a new gauge cluster for my 2005 wrx. i see a price diffrence in the jdm and usdm sti gauge clusters is the only diffrence the mph and km? also how is the install anything diffrent i should know about the two. i have read that i need to purchase a 2005 cluster so i dont have any problems with noise that some are having. i would like it to just be a plug and play dont want to cut wires or have to rewire. thanks for any help that anyone can provide.