Ford C4 Automatic Transmission 0.788" 26 / 24 Spline Billet Steel 300M Input Shaft Speedmaster coil springs are designed

Speedmaster coil springs are designed to withstand the high stress levels of modern suspensions

Suits: 1-149-004 and 1-149-005 Manifolds

2 SFI Approved and will withstand the extreme power and rpm of your performance application

and highly viscous silicone fluid between the two--these SFI-approved Fluid dampers can control all crankshaft vibration

Ford C4 Automatic Transmission 0.788" 26 / 24 Spline Billet Steel 300M Input Shaft Speedmaster coil springs are designedThese Performance Automatic hardened input shafts are custom forged from 9310 non twist steel. Quality, performance and great value make these hardened input shafts an essential component for anyone looking to raise their transmission to the next level.