IS-C F Sport Shift Knob on RC350 F Sport
 

My factory knob was looking a little ragged so I wanted to upgrade but wanted to keep the F Sport theme. Couldn't find any information on if the IS-C Special Edition shift knob would fit the RC so took a chance and ordered one. It requires some modification but got it to work. You need an M8x1.25 to M12x1.25 adapter. Got mine on Amazon for $5. You also need to cut down the clip facing the seats on factory shift boot. I took a little off each side with a Dremel. This allows the factory boot to slip and remaining clips to slip almost entirely into the bottom of the IS-C shift knob (it has a recess in the bottom to allow the reverse lock out from the IS-C to slot into). It leaves a little bit of the clips exposed but I got around this by pulling up the leather to meet the bottom of the new knob. It is very little as in you need to put your head level with the shift boot to even see it. Looking at from sitting in either seat you are not able to see any gap, but pulling up the leather eliminate it completely.

Feels and looks way better than the worn factory unit and it leaves enough of the clip in place where it can be swapped back if needed. One thing to note if you want to do this, get one of the M8 to M12 adapters that has the "geared" ring around it, this will act as the stop for the IS-C knob. You get one chance to get the placement perfect. The threading on the IS-C knob is plastic, so if you over crank it will eat into the threads. I went a little over then when I tried to straighten it out, it was loose. I had to go another full rotation and ate into the threads a bit. Once you start feeling it get tight, be careful to position it where you want and don't over tighten as you can't go back.
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Very clean. If it wasn't for the different colored stitching, it almost looks OEM. I was wondering if all shift boots had a universal size, but this answers that question.

Yeah, I was apprehensive of that at first but the factory knob wore really quickly for some reason. I saw this one and kind of fell in love with it (sucker for F Sport stuff). It looks pretty good in person even with the contrasting stitching between the boot and knob.

What is interesting is that there is a blue stitched shift boot available (I think from the RCF) that I have seen some people with RC200/300/350s switch to. It is crazy involved though as you have to remove the center console to do it. I may or may not make that plunge at some point. Next up on the list is the F Sport Lowering Springs, Cusco strut tower bar, and RR Racing steering bushing kit. I would like the front end to be a little more responsive. I will look at the shift boot once all of that is done.