Can I fit a 2016 IS 350 rear diffuser on my 2017? I bought the oem circular tail pipe extensions to replace the rectangular ones, but now I’m thinking the extensions might look weird with the with rectangular exhaust opening on the 2017 diffuser.

 

Hey @treygk I've moved this up to the general 3IS forums, since this is not a build thread. Hopefully you will see more attention here.

 

Yeah all the diffusers from all years are direct swaps (except 2021+)