Defender15

Hi i got a 2017 is350. Bought the seibon hood and it fit. Waiting on my seibon trunk but was told its exactly the same as the 2014. My question is has anyone put the seibon carbon diffuser on their 2017. Are there any other carbon diffusers that would fit

Sasnuke

Technically the diffuser will fit as the bumper is the same. You just have to deal with the exhaust tips as the 2017 has the teardrop shape and 2014-2016 is oval.

Defender15

Behind the oval tips you can unscrew the tips off. Its ok not gonna use that exhaust anyways. Just want to make sure it fits.

specONE

iTrader: (3)

Yes it will fit
you can see discussion on the forms of fitting'17+ diffuser on 2014-2016 rear bumpers

Only the to be concerned about is the tips like mentioned already