Seatbelt cover
 

The wife was complaining about the seat belt digging into her neck.
I looked around and found these leather ones with yellow stitching from The Tuning Shop (via Amazon): https://www.amazon.com/gp/product/B0...ilpage_o02_s00

They are a little pricey ($30), but well worth it IMO. I just got them yesterday. I think they look great and perfectly fit in with the OEM stitching.
http://i.imgur.com/oiAMc02.jpg

I use these: http://www.ft86club.com/forums/showthread.php?t=58645
They're longer and also have loops so they don't slip down.

They've just started offering them with yellow stitching as an option for the series.yellow.
http://www.emdomusa.com/Emdom-GT86-S...et-p/eu184.htm