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These are T1 (racing) front upper control arms that GM made to help the problem of rubber bushings that "walk" out of the control arm. A known issue. They have a higher durometer rubber in place of the original softer rubber. Durometer is the measure of stiffness or flexibility of the rubber.
I bought these new & used then about 3 months before moving to poly bushings. They are left & right - not interchangeable.
You know if you need them & if yours are good, don't worry about it, you are not braking hard enough to move them.
Improved steering response, turn in, holding your alignment settings, are some benefits even if your original ones look good.
$475 for the pair shipped to lower 48. Add 3% for PayPal.
GM part # Left 12480072
GM part # Right 12480073
The arm and bushing come as one complete unit not a separate bushing and a separate control arm.
Here is a link to the full kit when it was available. Most of the parts are unavailable now.
Corvette Store
FS C5 & C5Z06 front upper control arms **T1**
