Team Losi Racing 22X-4 Complete Metal Center Gear Differential Set

I recently purchased my second 22x4 kit, the first being about a year ago in the spring of 2020, and I picked up this center diff with both kits to use when I run the cars on loose dirt surfaces. Obviously for a $500.00 1/10 kit it would be nice if this was included, but with all the nice carbon and aluminum parts they include its not a surprise that its another $40.00 for the diff. The quality of the diff and parts is identical to the stuff that comes with the kit, and the price is actually good compared to what other companies offer as it comes with oil and the 2 spur gears. I found the included 200k diff oil is a bit thick for the slick hard packed dirt outdoor track near me and I changed to 100k in my older 22x4 last year, but I built the new one with the 200k again as I can now drive them back to back to compare and adjust as needed. Both cars run 6.5t setups.