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Holley Injector Pod Upgrade Kit 2-Barrel Pro-Jection Throttle Body

510-534-170

made in usa

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Injector Pod Upgrade Kit 2-Barrel Pro-Jection Throttle Body
$157.99
Injector Pod Upgrade Kit
  • 2-Barrel Pro-Jection Throttle Body
  • Pod, Wiring Harness, and Retaining Plate Included
  • Free Shipping - Estimated to ship direct from manufacturer on 06/02/22 , pending manufacturer availability. Learn More
    QTY
    534-170 - Holley Pro-Jection TBI Replacement Parts is rated 3.5 out of 5 by 2.
    Rated 4 out of 5 by from Needed tweeking The fuel return passages from the injector pods to the pressure regulator chamber needed to be cleaned up with a Dremel grinder at the entrance to the pressure regulator chamber. There was enough casting flash left over to block the passages at least 75%. Fuel pressure is now stable thru all engine speeds and blower pressures. There is still an "O"ring issue in the injector pods at the lower end of the injectors. I solved the problem by adding two thin "O" rings to seal the injector at the bottom and used the supplied "O"ring between the bottom injector filter and the pod body. The fuel drip into the throttle body is now gone and the engine runs amazing smooth and strong.
    Date published: 2018-09-06
    Rated 3 out of 5 by from Not the best but, it's the only one available. So the OG round top injectors are crap and the key to getting one of these systems to function is the elimination of those parts. Now the upgraded injectors were used in general motors heavy duty applications like the Kodiak, and the very much light duty vehicles like the sun bird in single barrel format, point being is this adapter allows the use of injectors with a proven track record and had TBI not been retired these Delphi style injectors would have been used in everything else GM produced, that said how whatever manufacturer holley hired to make these adapters managed to cast them so poorly is beyond me, and then having the nerve to charge what they do is an example of being the only option means you don't need to worry about quality. So if you buy one of these know that yes its worth the hassle but be prepared to clean up the casting and have spare O-rings on hand. And if anyone from Holley reads this, stop cheaping out on simple parts and charging top dollar.
    Date published: 2022-05-20
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    What injectors are supposed to be used with this setup. Part number preferred too.

    Asked by: Gmc94
    You must have a Holley Commander 950. The injector number is 522-43 from Holley
    Answered by: SteveM
    Date published: 2019-01-01
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