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10-01-2012, 09:47 PM
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#1 |
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Registered User
Join Date: Nov 2011
Location: Rapid City SD
Posts: 140
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454 Exhaust manifold flange size question?
I am in the middle of swapping in a 454 from a 78 Suburban into my 70 3/4 ton. I am re-using the manifolds off the suburban, but want to build my own 3" exhaust. I have searched all over the web and cant seem to find what size the flange is on the manifold. Any help would be appreciated.
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1970 : Chevy: K20 "Frank the Tank" 6.0 LS, 4L80E, 14 bolt, and Dana 44 1970 K5 Blazer CST 350, TH350, Np205, Dana 60 and 14 bolt General Motors Master Certified wrench swinger ASE certified Master auto tech Instructor of Automotive Technology |
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10-02-2012, 12:45 AM
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#2 |
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Registered User
Join Date: Sep 2012
Location: Idaho
Posts: 652
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Re: 454 Exhaust manifold flange size question?
2 1/2" inside dia., 3 stud.
Just measured the one of my stash of big block exhaust manifolds |
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10-02-2012, 09:23 PM
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#3 |
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Registered User
Join Date: Nov 2011
Location: Rapid City SD
Posts: 140
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Re: 454 Exhaust manifold flange size question?
Thanks for the sizes but still cant seem to find a universal type of end I can use. I might have to bite the bullet and have the exhaust shop make me up something.
__________________
1970 : Chevy: K20 "Frank the Tank" 6.0 LS, 4L80E, 14 bolt, and Dana 44 1970 K5 Blazer CST 350, TH350, Np205, Dana 60 and 14 bolt General Motors Master Certified wrench swinger ASE certified Master auto tech Instructor of Automotive Technology |
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