This is a brand new 1963 - 1977 Corvette 355 Pound Fiberglass / Composite Transverse Monoleaf Rear Spring Kit   LONG out of stock - they are back! USA made by the patent holders of the TRW - designed Composite Transverse Leaf Spring! 2 1/4 inches wide and #355 version.  We also stock the 315 and 340 rate springs listed elsewhere on Ebay. The #355 version is a close replacement for the for the F-41 Gymkhana spring while the #315 and #340 rate springs are for drivers who want a balance between greater performance than the stock spring , but less harsh than the gymkhana #355 rate. Each composite spring is accompanied by all the necessary mounting hardware, including spring bolts and a special heat shield. Restore lost ride height and eliminate "squeaks"! They are state-of-the-art technology and were standard equipment on all 1980 - 1996 Corvettes! This composite leaf spring will give you a comfortable ride without sacrificing performance. It is a highly economical way to upgrade your 1963 - 1977 Corvette for ride and performance. Our decades of excellent customer service on Ebay shows in our Feedback. Please contact us if there is a problem and we will do our best to make it right.