Product Description
For Ford Modular 4.6L and 5.4L engines with PI 2v heads. These have been used with 20psi without any issues. We recommend these for most applications not seeing over 30psi. These are comparable to the PAC 1214x valve springs.
Beehive Single
-OD 0.700"/.630"
1seat pressure: 120lbs@1.640"
Rate 275lbs/in
CB: 985"
Max Lift: .600"
Use with OEM retainer
