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C4 L98 EGR vs. F-body EGR

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Old 02-13-2017, 07:34 PM
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C4 L98 EGR vs. F-body EGR

What is the difference between the f-body EGR and the C4 EGR set up?

I've the chance to buy a low mile C4 L98 but since I live in California I have to smog the car. The smog guy might call out an external EGR.
Old 02-13-2017, 07:38 PM
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Re: C4 L98 EGR vs. F-body EGR

Hard to say, depends on the smog tech. All smog equipment will be present in the stock locations, just the EGR tubing is external on the vette I think. I'm not sure the reference they use will get that specific?
Old 02-13-2017, 07:44 PM
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Re: C4 L98 EGR vs. F-body EGR

Originally Posted by thtanner
Hard to say, depends on the smog tech. All smog equipment will be present in the stock locations, just the EGR tubing is external on the vette I think. I'm not sure the reference they use will get that specific?
I sure hope not. Other than that it's a direct swap. All the f-body parts should just bolt up.
Old 02-14-2017, 09:48 AM
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Re: C4 L98 EGR vs. F-body EGR

If you have headers you might want to contact dyno don or scoggin dickey and see if they still make sd3816. Sd3816 use to be the pictured kit now the vortec intake on.


Last edited by Tuned Performance; 02-14-2017 at 09:59 AM.
Old 02-14-2017, 10:19 AM
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Re: C4 L98 EGR vs. F-body EGR

..
Old 02-14-2017, 10:37 AM
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Re: C4 L98 EGR vs. F-body EGR

Thanks Tuned. I'll contact them and see if they still make this kit.


Originally Posted by Tuned Performance
If you have headers you might want to contact dyno don or scoggin dickey and see if they still make sd3816. Sd3816 use to be the pictured kit now the vortec intake on.

Old 02-14-2017, 10:51 AM
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Re: C4 L98 EGR vs. F-body EGR

If you can't find one you can always cut the piece off a vette manifold. I think I have the pieces as well .
Old 03-24-2017, 04:38 PM
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Re: C4 L98 EGR vs. F-body EGR

Would I be able to pass smog if I got rid of the EGR system?
I could leave it in place to pass the visual and have it tuned out of the computer. Would that make the NOx emissions to high to pass?
Old 09-28-2019, 01:38 PM
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Re: C4 L98 EGR vs. F-body EGR

Is Kevin still doing tunes? May wind up with a TPI car this yr
Old 09-28-2019, 01:56 PM
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Re: C4 L98 EGR vs. F-body EGR

Yes he is

SD disco'd that part
Old 09-28-2019, 01:58 PM
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Re: C4 L98 EGR vs. F-body EGR

Originally Posted by yaj15
Would I be able to pass smog if I got rid of the EGR system?
I could leave it in place to pass the visual and have it tuned out of the computer. Would that make the NOx emissions to high to pass?
That might work with aluminum heads, have done a few.
Old 09-28-2019, 02:00 PM
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Engine: L98 - full intake & exhaust boltons
Transmission: Bowtie 700r4, 2400 rpm stall
Axle/Gears: Borg-Warner 9bolt, 3.45 gears, posi
Re: C4 L98 EGR vs. F-body EGR

Originally Posted by Dyno Don
That might work with aluminum heads, have done a few.
Sounds good. I'd need to do that if I bought a zz6 crate motor




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