Atomic - Anti Pump-Up Hydraulic Lifters – Ford SOHC 6-Cyl | 11mm OD

High RPM and hydraulic lifters don’t always play well together — especially when valve float or lifter pump-up starts stealing your performance. That’s why we developed the Atomic Anti Pump-Up Hydraulic Lifters, designed specifically for the Ford SOHC 6-cylinder engine.

Built with tight internal tolerances and a reduced internal cavity, these lifters are engineered to minimize oil bleed-down and lifter rise at high RPM, allowing for more stable valve operation and better camshaft tracking. Perfect for naturally aspirated or turbocharged SOHC builds, especially those with aggressive cams or high-RPM use.

✅ Key Features:

✅ Suits Ford SOHC 6-cylinder engines
✅ 11mm outer diameter – direct drop-in replacement
✅ Anti pump-up design – reduces valve float at high RPM
✅ Ideal for street, performance, and mild race applications
✅ Improves valvetrain stability and camshaft control
✅ Helps maintain consistent lash and lift across RPM range
✅ Recommended maximum preload: 0.8mm (0.030") for street builds

🛠️ Why Use Anti Pump-Up Lifters?

✔️ Prevents lifters from over-extending and interfering with valve operation
✔️ Allows the camshaft to operate as designed at higher RPM
✔️ Critical for engines with stiffer valve springs or aggressive cam profiles
✔️ Increases top-end reliability and performance
✔️ Drop-in install – no machining required

📦 What’s Included:

• Set of precision-ground Atomic Anti Pump-Up Hydraulic Lifters

• Ready to install – ideal for performance rebuilds or upgrades