BSR style aluminum spring perch helix for conventional spring cars. Zero degree helix. Takes a 5 1/2 to 5 3/4 diameter front spring. Used to alter the spring angle in the suspension bucket with the spring helix's. Helix bolt pattern is 3 3/8" BC. Comes with matching 15 degree spring shim as well. Excellent condition.
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On Feb-04-13 at 11:56:27 PST, seller added the following information: