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Post Info TOPIC: 75 455 exhaust manifolds


Veteran Member

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Posts: 57
Date:
75 455 exhaust manifolds


the standard Pontiac cast "log" manifold actually flows better than many people might think - the same units were used on non-Ram Air GTO's that made 350hp.

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1970 Formula 400
Carousel Red on black (std) interior
no engine, transmission, or wheel option

1:411 1970 Firebird Formulas originally sold in Canada

Luke 23: 39-43 / Ephesians 2: 8-9  / 1 Corinthians 2:12-14 / 2 Timothy 3:1-5;12



Poncho Master!

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Posts: 1986
Date:

were they all 2 in or were some 21/2 on the exit, my concern is that it is 455 , I would figure larger would be just common sense.



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Poncho Master!

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Posts: 2286
Date:

Unfortunately not, the biggest you could get with the log exhaust manifolds outlet was 2 1/4 ".



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Poncho Master!

Status: Offline
Posts: 1986
Date:

that's why I was thinking going to the 21/2 inch repro, plus when every bolt breaks in the head and I have to lift the motor up to change gaskets then its a perfect time to update it.



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