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403 Headers [message #345712]

Thu, 25 July 2019 13:15

xplorid

Messages: 213
Registered: February 2012
Location: Boise

Karma: 0

Senior Member

Used Doug Thorley headers from a GMC 403. Shipped from Boise ID.
I can send pics if you need to see em, they appear to be in good shape but I never installed them.

Jeff
too oh ate ate five nine eighteen fifty seven

1974/94 GMCII by Explorer Manny 6.5 TD Al radiator 1 ton front 4 bags back

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Re: 403 Headers [message #345713 is a reply to message #345712]

Thu, 25 July 2019 13:44

6cuda6

Messages: 975
Registered: June 2019

Karma: -6

Senior Member

xplorid wrote on Thu, 25 July 2019 14:15

Used Doug Thorley headers from a GMC 403. Shipped from Boise ID.
I can send pics if you need to see em, they appear to be in good shape but I never installed them.

Jeff
too oh ate ate five nine eighteen fifty seven

Jeff just sent you a text for info and pics.

Rich Mondor, Brockville, ON 77 Hughes 2600

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Re: 403 Headers [message #345736 is a reply to message #345713]

Thu, 25 July 2019 17:49

xplorid

Messages: 213
Registered: February 2012
Location: Boise

Karma: 0

Senior Member

No text received, might check the number...

1974/94 GMCII by Explorer Manny 6.5 TD Al radiator 1 ton front 4 bags back

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Re: 403 Headers [message #346205 is a reply to message #345712]

Wed, 07 August 2019 21:21

Tony Schroeder

Messages: 1
Registered: August 2018

Karma: 0

Junior Member

I am interested in the headers. Quick question though, do they end up in the same place as my stock exhaust - so I don't have to re-do the entire exhaust?

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Re: 403 Headers [message #346211 is a reply to message #346205]

Thu, 08 August 2019 06:49

6cuda6

Messages: 975
Registered: June 2019

Karma: -6

Senior Member

Tony Schroeder wrote on Wed, 07 August 2019 22:21

I am interested in the headers. Quick question though, do they end up in the same place as my stock exhaust - so I don't have to re-do the entire exhaust?

No they do not....most header come out straighter and lower than stock....it will require you exhaust to be modified for position and flat flanges for attachment. Any competent exhaust shop should be able to do the work.

Rich Mondor, Brockville, ON 77 Hughes 2600

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