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					Originally Posted by Silver69Camaro
					
				 
				Yep, both Hyperco and Flex-a-Form makes them.  Roughly $400-500 for a pair.  I've got a set of 200lb Hyperco springs. 
 
The kicker:  they're about 10lbs each! 
			
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 Is there a website for these? I would also like to know the lateral deflection as well, good point by PTAddict.