PAPOST 1 Report post Posted September 24, 2017 I have a GT86 2015 model. The OEM head unit is a TAS300. I agree that the knobs are too small, so this is my solution using a 20mm grommet, it fits exactly. I have inlaid a red cable sheathing to match trim. 1 vanko25 reacted to this Share this post Link to post Share on other sites
