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Old 10-24-2011, 09:32 AM   #55
radz28
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Quote:
Originally Posted by SUX2BU View Post
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+2

However- 1/3 of SS was upgraded/improved for ZL1. The tranny is probably the same (or very closely related) as CTS-V's (the same goes either A6 or M6). The rear is a new cast-iron case with probably a 14-bolt differential. The rear cradle bushings have also been improved.

That's a scratch on the surface of what's been improved for ZL1
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