Our Corvette OE Style Heavy Duty 7 Leaf Steel Rear Springs are a direct replacement for your 1963-1977 Corvette's original equipment. 7 Leaf Heavy Duty Leaf Springs were standard equipment in all Big Block equipped Corvettes and Small Block cars with F41 or FE7 Gymkhana Suspension options. Manufactured to exceed OEM specifications, these springs offer exceptional ride and handling characteristics.