Espace Blog
How to DIY replace the rear springs

OEM valve springs have approx 50 psi seat pressure, once 15 psi is added to this equation (which acts against the valve spring), approximately only 35 psi seat pressure is left. Xr6 ba bf fg ford valve springs heavy duty pro springs suit all ba/bf and fg ford dohc 6 cylinder barra 4.0l engines.