Ive got 85 quarter mile track runs - plus at least that many on the street. I flog it constantly.
I put new factory ones in my diff.
Being nervous about these stub shafts, I check them everytime the car is jacked up.
They are still tight...
However, my car is a 7AT, and not really fast.
Its hard to beat OEM parts for materials, Machining dimensions and heat treating quality control. Chances are - these Z1 come from Sum Tin Wong manufacturing.
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NA on E85 - 12.669 @ 110 mph (stock fuel pump)
100 shot E85 - 11.589 @ 117 mph (DW fuel pump)
JWT C2 cams rev Base Circle & Titan Valves
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