ZD first helical hollow gearset. I've run a stress test on these and was very impressed with the result. Defaintely worth checking out if you're looking to try out helical gears. These ones do have "SHS" writing on them butrest assured these are not SHS gears.
- Improved tappet pin location
- 40CR steel material (around HRC45 hardness)
- Improved teeth chambering
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