8mm Stainless Valves | Hydraulic Roller Ready | Built for the Blue Oval
Give your ProMaxx 300 Ford heads the top-end support they deserve with this all-in-one basic valvetrain kit—engineered for hydraulic roller setups and designed to handle up to .540” lift. It’s a strong, reliable combo that delivers smooth operation, high-RPM control, and long-term durability.
Kit Includes:
???? 6 Intake Valves – 8mm stainless steel
???? 6 Exhaust Valves – 8mm stainless steel
???? Beehive Valve Springs – For hydraulic roller cams, rated to .540" max lift
???? Steel Beehive Retainers – Made for 8mm valve stems
???? Forged Valve Keepers (Locks) – Secure 7° fitment
????️ Viton Seals – Designed for 8mm valve stems and beehive spring seats
Why It Works:
ProMaxx 300 heads already flow strong—this kit ensures your valvetrain keeps up. Lighter 8mm valves reduce valvetrain mass, while the beehive spring setup improves stability and RPM potential. Whether you're building a street machine or a track weapon, this setup is built to run hard and stay tight.
For Ford Builders Who Don’t Do Half Measures.
Drop the drama, keep the lift, and let it sing.