I wasn’t expecting it to be as bulky as it is. I’d say the diameter is like a half dollar coin. Had to modify my shift boot a bit but other than that it’s a nice detail and clips well.
Super easy to install, looks amazing with the ESCO T6 Shift Knob.
For when that warranty runs out or if you don't care about that, one of the biggest things you could do is tune your car. The amount of information that the V2 shows on the screen that the factory 11th-gen Civic SI doesn't tell you is very helpful to the life of the vehicle. The TSP tune is also quality had it for around 20k miles now and two oil reports showed the wear metal within what the engine would normally do so so far for reliability its just like factory.