Check the option parts that XRAY Team driver Paul Ciccarello from the US has been using at his XRAY XB8'21. Paul explains also the benefit of each part, for which track conditions they should be used and what performance improvement you will experience
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Alu Engine Mount & Stand #358709 Monoblock Mount #358719 Stand
>>> These alu engine mount and stand is nice to have to keep the gear mesh consistent at a race while checking the clutch
#352372 XB8 Alu Steering Block Plate +2mm
>>> The alu steering block plate gives me all the steering I need for tight 180s but still no too much steering in the wide turns
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Extreme Heat Resist. Center Diff Pin with Inserts #355087 Alu Diff Pin #355083 Diff Pin
>>> These diff pins keep a consistent mesh of the diff gears in the long mains and throughout the season
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#358400 4-Shoe Clutch - Complete Set #358413 3BB Clutch Bell 13T - Lightweight + 3x Ball-Bearing
>>> I have been using 2 carbon/2 med alu shoes with med springs lately and it gives me the right amount of slip and smoothness to get the most power out of my engine. The 3 bearing clutch bell distributes the load and saves the bearings so you can run them over and over again without failure.