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Holley Replacement 670 cfm TBI 1987-89 GM 5.7L V8 truck


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Replacement 670 cfm TBI 1987-89 GM 5.7L V8 truck
Replacement 670 cfm TBI
  • 1987-89 GM 5.7L V8 truck
  • Free Shipping - Estimated to ship direct from manufacturer on 11/10/22 , pending manufacturer availability. Learn More

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    502-6 is rated 4.0 out of 5 by 8.
    Rated 5 out of 5 by from Great product Only took a few minutes to put in everything went smoothly and can feel the extra power
    Date published: 2019-12-31
    Rated 5 out of 5 by from Happy Customer Stock 1987 chevy truck 5.7 vin K motor. Spectre ram air kit, Trans-Dapt spacer (between tbi & intake), long tube headers. Really brought my truck to life. Runs like a scalded dog compared to before. Turn down the fuel regulator to lean out rich fuel mixture if need be. Very rich when I first put it on. Get a heated o2 sensor for long tube headers. My setup, with a little fuel pressure tuning, goes into closed loop (ECM).
    Date published: 2018-03-06
    Rated 5 out of 5 by from Great Product Had the Holley on my k1500 for about 3-4 weeks now. The throttle response is great compared to the stock TBI from over 20 years ago. Simple install minor tunning to get idle right but feels like a gain of around 20-30 horsepower with my headers combined.
    Date published: 2016-09-27
    Rated 5 out of 5 by from Woke up our Suburban Could not be happier. Our Birb was sluggish and needed a wake up. I had read conflicting reviews about leaks etc. all I can say was mine was perfect, it was quick to install and gave no issues. I can see where if you were not carefull you could cross thread the fuel lines but that would be solely operator error. The difference in performance was night and day. If I was building another TBI this is the first mod I would make.
    Date published: 2015-08-25
    Rated 4 out of 5 by from Great Product The product was easy to install and works perfect. Only issue was checking out, redeem code didn't work and I paid full price.
    Date published: 2020-11-25
    Rated 4 out of 5 by from On the fence I replaced the stock throttle body off of my 89 Chevy van with this upgraded Holley throttle-body. The original throttlebody on my van worked fine although it was 30 years old and I felt the upgrade would be a positive. My van currently has a new crate motor, Edlebrock intake, headers, a stage II chip, and a rebuilt 700r4 tranny with a shift kit. I figured the Holley would be icing on the cake. Well.... it’s more like a sugar glaze. I’m not 100% convinced that I can feel much difference by the seat of my pants test. It has lead me to consider an upgraded fuel pump since I am currently running the original. I have read that unhooking the battery then reconnecting it will reset the computer which should adjust itself to the new throttle body. I did that so we’ll see the results soon. I hope. Happy with the product. Ready to feel the performance.
    Date published: 2019-10-31
    Rated 3 out of 5 by from Yes, it is very nice! I bought this 5 years ago for maybe a little more than 300.00 though. Has our currency lost 50% of it's worth? Why is this so expensive now? In fact, why are so many thing so much more now than they were just a few years ago?
    Date published: 2018-05-17
    Rated 1 out of 5 by from not worth the trouble I tried not one but two of these replacement TBI, both ran extremely rich. Tried adjusting the flow per tech suggestion and added performance ignition to burn hotter, no improvement. definitely not worth the money or the time. Jegs did refund my money promptly and without a hassle. Rebuilt the OEM TBI and have good throttle response and fair mileage.
    Date published: 2018-07-11
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    Yes i have a holley tbi on my 89 5.7 chevy 4x4. When i step into it i have a bad hesitation.any suggestions.

    Asked by: Hotrod 45
    It may need to be runed or it has a clogged injector.
    Answered by: Rusty B
    Date published: 2018-08-09

    Will this Holley unit fit a 1991 Chevy V2500 Suburban 5.7 TBI.

    Asked by: emag
    This TBI unit should fit your application. https://www.jegs.com/i/Holley/510/502-9/10002/-1
    Answered by: Rusty B
    Date published: 2018-06-25
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