This part by BlackZon is a genuine OEM part for your car
Fits all versions of the Smyter and Smyter Turbo
The Steel Spur must be used with HD Center Driveshaft:
#540242 - HD Center Driveshaft & Drive Cup Set
It is also recomended to upgrade the Main Differential Gear when using the Steel Diff Pinions:
#540236 - Complete Differential (Steel Gears/Diff. Cups)
Fits:
Smyter
Includes :
(1) Steel Spur Gear & Differential Pinion Se