Xray T4 15 to 17
 

I currently have a T4 '15 that I use for club racing. It's perfectly adequate for me, but like the majority of us I appreciate new things every so often. Having picked up this car fairly recently in quite a state, I've changed a few parts etc, and converted to a 2016 ally flex chassis and finally got it all working quite well.....but it could still be better. There is a few bits of slop around the place that I'm yet to iron out, so in the process I'm looking at other 2016/2017 parts that are worthwhile swapping to.

I assume things like front hubs, ECS shafts etc are straight swaps? Is there anything in particular that is worthwhile getting hold of too?