Torsion Bar Pair, High Performance, Series I and II E-Type, .860" Diameter.
Torsion bars are essentially an unwound coil spring and are the foundation of the E-Type front suspension. Over the years they will sag just like a coil spring. These bars are larger than the standard E-Type torsion bars and thus offer a stiffer, but more controlled, ride. They are still perfectly OK for a street car, however.