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JEGS Adjustable Rocker Arms for Ford FE 330, 352, 360, 390, 410, 427, 428

555-20199


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Adjustable Rocker Arms for Ford FE 330, 352, 360, 390, 410, 427, 428
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$370.99
$337.99
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Rocker Arm Assembly
  • Ford FE 330, 352, 360, 390, 410, 427, 428
  • Adjustable
  • All New Ready to Bolt Down
  • Free Shipping - Ships

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    JEGS Adjustable Rocker Arms for Ford FE 330, 352, 360, 390, 410, 427, 428 is rated 3.1 out of 5 by 7.
    Rated 5 out of 5 by from New Adjuster Screw I've bought a few sets over the years. It seems as they have improved the the adjuster by adding more material to the adjuster. Works flawlessly
    Date published: 2024-01-31
    Rated 3 out of 5 by from Needs improvement Adjuster broke. After looking at past reviews it seems this is an ongoing problem with this part.
    Date published: 2023-03-21
    Rated 3 out of 5 by from Nice looking rocker assembly The product is nice but I wish it had a lock nut and didn’t rely on lock tight to hold the adjustment screw in place. I also wish anyone else who has bought these would Wright a review so I knew how they work in the long run and if they last.
    Date published: 2020-04-26
    Rated 1 out of 5 by from DO NOT BUY THESE I put these on my brand new edelbrock heads and within 1 year (less than 100 miles) as I don't drive it much, the adjusters loosened up and backed off allowing the push rods to get loose and destroyed my fresh 410 built. One lifter legit jumped out of the lifter hole and allowed the rod to crack my brand new aluminum intake! STAY AWAY FROM THESE! I've got a set of FOMOCO 428 rocker assemblies that still to this day hold there adjustments. I should have just used them. Now I'm out an engine. Don't make the same mistake I did if you value your engine!!!
    Date published: 2023-08-13
    Rated 1 out of 5 by from Horrible workmanship I bought this set in the summer and just got around to installing them. 4 of the 16 adjusters broke. I don't trust any of it. I wish I could rank it 0.
    Date published: 2022-11-20
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    What size are the adjusters? I believe they are 7/16-24. Can I put jam nuts on them so they won’t backoff?

    Asked by: Flash
    The adjusters on the Jegs are 7/16-20 and do not accept jam nuts.
    Answered by: jshook
    Date published: 2025-12-18

    Where are these rocker arms manufactured?

    Asked by: daydream_guy
    The Jegs 555-20199 rocker arm set is made in China.
    Answered by: jshook
    Date published: 2024-06-07

    Do these come with lock nuts I'm having issues with the screws on the rocker arm backing off causing valve issues.

    Asked by: 66 galaxy Dan
    The Jegs 555-20199 rocker set does not come with lock nuts. Red Loctite is to be used.
    Answered by: jshook
    Date published: 2024-11-14

    What is the diameter of the ball end of the adjuster? The part that fits into the cup of the pushrod. Thanks!

    Asked by: Markat780
    Jegs 555-20199 the ball end of the adjuster is 5/16
    Answered by: langus
    Date published: 2024-10-18
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    Some parts are not legal for use in California or other states with similar laws / regulations

    Motor Vehicles

    WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.

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