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Injector size question

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Old Nov 9, 2016 | 09:56 AM
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Default Injector size question

Need some advise on my engine.

Looking for a good set (tested) of injectors. I believe that this year engine had the 21# size injector. Finding several in the 24 & 36# rating. Need to know before I order the reflash. Also let me know if someone has a good set of injectors.

1999 5.3

2000 LS1 cam & converter

Everything else is stock. It has an EGR, no A.I.R, running A/C, cat.

Daily driven S-10, 4L60e & 3.42 gov-loc posi.



Jim
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Old Nov 9, 2016 | 10:05 AM
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If you're getting it reflashed, then just pick up whatever injectors you can find to fit and have it flashed for those injectors.
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Old Nov 9, 2016 | 11:10 AM
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Found a set of 36# for an 02-05 Silverado. $80 bucks NIB.
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Old Nov 9, 2016 | 11:21 AM
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4.8L 5.3L Chevrolet GM Fuel Injectors OEM 12613411

Listed as 2010 - 2013, Does anyone know if these will fit my 1999 intake/fuel rail?

Thanks
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Old Nov 9, 2016 | 12:27 PM
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I think other than LS3 injectors, they all fit the truck rails/intake just fine. Worst case, you'll either have to run spacers on the rails (less than $10 total and available local), or swap over to a flex fuel rail since they were designed for the taller injectors.
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