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View All Proform Aluminum Roller Rockers

Proform Aluminum Roller Rockers for Small Block Ford with 1.6 Ratio & 3/8" Stud

778-66911

Proform

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Aluminum Roller Rockers for Small Block Ford with 1.6 Ratio & 3/8" Stud
$171.99
Aluminum Roller Rockers
  • Small Block Ford
  • 1.6 Ratio
  • 3/8" Stud
  • 16/pkg
    • Estimated to ship direct from manufacturer on 06/26/23 , pending manufacturer availability. Learn More
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    JEGS 20990 - Aluminum Roller Rocker Arms Small Block Ford
    Part Number: 555-20990
    $301.29

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    66911 is rated 3.3 out of 5 by 7.
    Rated 5 out of 5 by from Hesitant but gave them a try I was hesitant to buy these based on the 2 negative reviews but thought to give them a try. I figured if they were really as bad as they said there would be a lot more negative reviews posted. Rarely do you see people take the time to write in when there's nothing wrong or if they're happy with the product but they sure will let you know when something's wrong. So I thought I'd write in and say that these are actually a pretty good set of rockers. I've had no issue what so ever. No rattling or catastrophic failure. I took the valve covers off after 5k and a couple trips to the track and everything is still tight. No issues, if you need some budget rockers these are great. Had them installed by my mechanic so unless you know what you're doing I'd suggest you do the same to avoid any problems.
    Date published: 2020-03-09
    Rated 5 out of 5 by from Solid Rockers Solid rockers if you're on a budget. No issues. Have them on my 302 for 2 years now and couldn't be happier.
    Date published: 2020-02-14
    Rated 4 out of 5 by from Happy with Performance Happy with the performance of these rockers. Good value for the money. Noticed a big difference from the stock rockers.
    Date published: 2020-03-10
    Rated 2 out of 5 by from Wear out over time Bought these for a budget build on a 306 SBF. Worked great for a while. I eventually boosted the car after 4 months and blew a head gasket. Pulled the valve cover off while taking the engine apart and noticed somthing on every single rocker.. the roller tip was shaving into the rocker itself. Some looked to be barely hanging on. My advice.. dont be cheap but a good set of rockers.
    Date published: 2018-10-13
    Rated 1 out of 5 by from Terrible quality Terrible quality. Received and half looked to be used already. Some even rusted.
    Date published: 2020-05-04
    Rated 1 out of 5 by from Ran these for about a week, the roller was riding sideways on my valves and started chewing some of the valves. Spend the money and get better rollers! These are trash!
    Date published: 2018-12-03
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    Will these fit GT40 heads ?

    Asked by: TMVT
    The Proform 778-66911 rocker set will fit a GT40 head provided it has 3/8 rocker studs.
    Answered by: jshook
    Date published: 2023-03-22

    will these fit on my 1993 ford mustang 302 5.0

    Asked by: greg dockham
    Yes, as long as you have a 3/8" rocker stud in the head.
    Answered by: Rusty B
    Date published: 2018-08-21

    1976 Broncos 302 fitment?

    Asked by: Johnny Badd
    These will work as long as you have the correct screw in studs.
    Answered by: Rusty B
    Date published: 2018-06-21

    I'm running these on promaxx 1102 heads. Will I need tall valve covers or will stock ones work?

    Asked by: curtist777
    You will want to switch to a tall valve cover for these.
    Answered by: Dean R
    Date published: 2018-01-25

    will these fit a stock cast iron 351w head

    Asked by: Amos 03
    These rockers fit heads with studs. They do not fit pedestal mount heads.
    Answered by: Jon Jegs Tech
    Date published: 2017-10-26

    '97 Ford explorer 5.0 l. Would these fit my vehicle? And if so, what else should be replaced at the same time?

    Asked by: JohnHicks
    No, These do not fit a 97 Ford 5.0L, You will need 66879
    Answered by: Jegs Tech
    Date published: 2017-09-14

    Will these fit on my 1965 ford falcon 289.with out changing the studs on t my heads?

    Asked by: Ivan 289
    This is designed for your engine, but you must use guide plates and heat treated pushrods which may require a different rocker arm stud.
    Answered by: Rusty B
    Date published: 2017-09-12
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