The question is: If you were to have a vehicle with independent rear suspension and the coil springs and the shocks were separate, could you then under the new rule replace the shock with a coil over and leave the original spring out?

Here is the section of the GCR concerning springs and coilovers for reference.

Springs of any origin may be used, provided they are of the same number and type as originally fitted, i.e., coil, leaf, torsion bar, and that they shall be installed in the original location using the original system of attachment. The joining of two or more coil springs by any means is prohibited. The use of tender springs (designed to capture the spring within the perches at full droop) are permitted provided the tender springs are completely compressed when the car is at static ride height. Shackles or spacers may be used to adjust leaf spring ride height. Spacers, including threaded units with adjustable spring seats, may be used with coil springs. Coil over threaded body shock/struts are permitted.


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Russell White
Indianapolis, IN
'85 Toyota Supra
ready for ITS in 8 months....maybe