The plastic spur definitely does not fit. It is too wide and the only way to get it to fit is to shim it away from the mount or sand it down.

However, if you set your mesh correctly, the metal 45 tooth losi spur works GREAT. It is nearly as quiet as the plastic. I have found that the metal to metal is loud if you set your mesh too tight, but just fine if you loosen it a bit.

You also have to dremel out the plastic hole covering a little bit as the spur may rub.

Other than that, the Losi kit is pretty nice. I like it in my 8t 2.0. Very simple to install and pretty solid.