They won't work. Player models are changed, shirts are longer and shorts are way tighter, not ugly and baggy like before.In regard to my post above, I found these on my travels, I have ZERO clue who made them and they are originally for PES2017 PS4, but I'm guessing they will work no problem in PC PES2018. This is the original google drive link I found with no scummy adfly crap. All Premier League 2017/2018 Kits in 2048x2048 minus Liverpool as they are licensed anyway. If you know who made these kits then please post their name so we can give them the proper credit they deserve :
https://drive.google.com/drive/folders/0By4gYanCiLNockRHSm1jVGxqTG8