Cadillac STS The newest installation of the performance sedan from Cadillac, having replaced the Seville

Speed Restriction 2005

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Old 11-07-2006, 01:19 AM
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Join Date: Nov 2006
Posts: 3
Default Speed Restriction 2005

How do I go about removing the speed restriction on a 2005 STS V-6. I heard about the tire ratings or whatever, but I have 22" ZR rated tires "A" Temp & "A" Tread ratings and I am limited to 121 mph at 4200 RPM's. What can I do or who can I get to increase the speed. I've read stories of the V-6 topping 148 mph. Please Help!!
 
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