Ken,
Just as a point of reference, as I mentioned before, I put the OEM sensors on my Z06 and have had them above 130 MPH at Pocono, Summit Point, and Road Atlanta. If you can get a refund on the ones you purchased, I would contact gmpartshouse.com. That's where I bought my sensors for the Z06 and the replacements for my '01 vert when the originals went bad. If you go this route, when you order the sensors, make sure you also order the retaining nuts. If I remember correctly, the total cost for the 4 sensors was around $140.
I hope this helps!
Rich
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[b]2010 ZR1
Crystal Red/Two Tone Titanium
2014 Z51 7 Speed Convertible
Laguna Blue/Grey/Grey
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