The main idea of the upgraded parts is to reduce the oil connection holes to increase the oil and lubrication pressure in the VCT system. In addition to this part: 5.4L 4.6L 3V Ford VCT Solenoid 8L3Z-6M280-B, consider these latest Ford parts: 5.4L 4.6L 3V Ford Cam Follower Rocker Arm 3L3Z-6564-A (replaces 3L3Z-6564- BA ) 5.4L 4.6L 3V Ford Hydraulic Lash Adjuster 5L1Z-6500-A5.4L 4.6L 3V Ford Camshaft/Cam Phaser 3R2Z-6A257-DA (comes with a 15mm one-way screw) I didn't like reusing Ford cam tower screws , so I used ARP Cam Tower 3V 4.6L 2005-2010 12 point stud kit ARP:156-1001. Those aren't bolts. They are studs with washers and nuts. Much better design and quality hardware. All Ford and ARP parts are generally available from Revain. It is extremely important to only buy genuine Ford parts to get the latest VCT redesign. It is also extremely important to use the correct weight of oil and make the necessary oil changes. The image I added shows the last updated part on the left. Note the smaller oil port opening.
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