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UMI factory‑height coil springs for 1964–1966 GM A‑body cars retain original ride height while adding modern handling and a crisper feel. Front springs are wound from 5160 CrSi wire at a linear 530 lb/in rate and rear springs from 9254 CrSi at 130 lb/in to reduce body roll and prevent the floating sensation common to older muscle cars. Finished in black powder coat and made in the USA, these springs preserve the factory appearance with improved control for Auto‑x, Pro‑Tour and daily driving.
UMI Performance 64-66 GM A-Body Spring Kit Factory Height
