Stronger Valves springs for PD Engines protecting against valve float at high rpm and under high loads, due to springs greater stiffness (+40% ) compared to the OEM Dual springs.
Includes:
8 inner uprated springs
8 outer uprated springs
With these dual valve springs you can run high boost pressures increase working RPMs safely. Fits All 1.9 PD 8v (fits without any modifications such as grinding the head)
