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  #1  
Old 05-08-2017, 12:14 AM
dreamn69 dreamn69 is offline
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Default Wanted EGR backpressure valve 1978 400
I need the backpressure valve from a 78 400. My Formula's is missing.

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1972 Formula 455HO
1979 W72 Fire Am
1975 455 4 speed TA
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  #2  
Old 05-08-2017, 07:33 PM
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77 Canamman 77 Canamman is offline
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1978 manual trans 10006987

1978 auto trans 10004749

https://www.hiltopautoparts.com/prod...55-ci-engines/



https://www.hiltopautoparts.com/prod...00-ci-engines/


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1977 Trans Am, 400/M21 Black/Gold Bandit. 44K actual miles

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Last edited by 77 Canamman; 05-08-2017 at 07:42 PM.
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  #3  
Old 05-09-2017, 10:11 AM
dreamn69 dreamn69 is offline
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Thanks

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  #4  
Old 01-10-2022, 12:23 AM
Jhankins Jhankins is offline
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Default 1977 GP 400 EGR back pressure valve
I am also looking for an EGR back pressure valve for my GP. It has an auto trans. I see that this is an old thread but anything for sale?

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  #5  
Old 01-10-2022, 08:34 AM
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nUcLeArEnVoY nUcLeArEnVoY is offline
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Quote:
Originally Posted by Jhankins View Post
I am also looking for an EGR back pressure valve for my GP. It has an auto trans. I see that this is an old thread but anything for sale?
Do you need one for concours resto, or do you just need functionality? Because I'm pretty sure most, if not all current new EGR valves now integrate the backpressure transducer into their mounting base so you don't need the separate transducer, anymore.

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  #6  
Old 01-10-2022, 01:24 PM
Jhankins Jhankins is offline
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nUcLeArEnVoY. I just need it to function! I'm not doing a full resto. I'll look into a new EGR valve. Thank you for the info.

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  #7  
Old 01-15-2022, 05:10 PM
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starlightblack starlightblack is offline
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Will need a tiny tack weld to re-attach tube but came off a running car

Yours for just shipping
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  #8  
Old 01-15-2022, 06:51 PM
Jhankins Jhankins is offline
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starlightblack, thanks for the offer, mine's detached in the same place! I will try and repair mine first. Thanks again!

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  #9  
Old 11-03-2025, 10:58 PM
Calidude Calidude is offline
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I have one of these and it had what looked like JB weld on it, I tried doing same again but would stick and pressure blew it off.

Mine is a 1976 and looks different than the ones above

I also see one on eBay and looks like it has some kind of plate in a revised design.

I have a fluxcore gas less welder has anyone tack welded these or will it damage? Did they come brazed?

Appreciate any help
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  #10  
Old 11-04-2025, 09:38 AM
burd burd is offline
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Try the guy in California. He has, use Amex just in case, he’s sleazy.
Why you want to use an egg, get rid of it.

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  #11  
Old 11-04-2025, 09:50 AM
burd burd is offline
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Picked this up, it’s so nice I’m keeping it , all og, too heavy to ship anyway. Even had the choke shield.
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  #12  
Old 11-19-2025, 02:46 AM
Whiteturd Whiteturd is offline
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Anyone else know how to repair what Calidude has as I have similar.

Brazing or welding?

Will that hurt it or how were these attached???

Someone is selling one for loads of cash on eBay at $275 that seems way high

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  #13  
Old 11-19-2025, 10:20 AM
burd burd is offline
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That’s not loads, these parts aren’t cheap.

SWAP MEETS.

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