Exhaust manifold flange gasket to head pipe

[lebshiff21]

Changing out my log manifolds for HP manifolds on a 383. The head pipes to my exhaust are flared. The log manifolds have what looks to be an insert in them to mate up with the head pipe and the HP manifolds are flat. What do I need to get the HP manifolds to do the same? My googling skills are failing me.

 

[493 Mike]

Different head pipes or remove the end of the pipes and weld on flat flanges.
Mike

 

[Durandal25]

Casting numbers determine head pipes sir. HP manifold have a different angle so getting the old pipes to fit is not going to work.

 

[yella71]

new head pipes.

 

[Master Gunner]

TTI exhaust makes head pipes to match HP manifolds, you need to have the casting numbers for the correct pipes.

Mark

 

[4mulas]

TTI exhaust makes head pipes to match HP manifolds, you need to have the casting numbers for the correct pipes.

Mark

This exactly

 

[yella71]

Its either that or a trip to your local exhaust shop

 

[RemCharger]

Its either that or a trip to your local exhaust shop

That would sure simplify things.

 

[lebshiff21]

That's where I'm headed, thought there might be a tapered insert or something I was missing. Looks like that's what I have in the log manifolds that came out. Thanks all.

 

[joemish]

Changing out my log manifolds for HP manifolds on a 383. The head pipes to my exhaust are flared. The log manifolds have what looks to be an insert in them to mate up with the head pipe and the HP manifolds are flat. What do I need to get the HP manifolds to do the same? My googling skills are failing me.

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Unless your running on a track for big$$$ it's a waste of time and money to change exhaust manifolds.

 

[bbbb]

Accurate Exhaust. Roseburg,Oregon

 

[4mulas]

Unless your running on a track for big$$$ it's a waste of time and money to change exhaust manifolds.

There is a major difference in a log style manifold and a factory hp one. Well worth the upgrade and change in my opinion

 

[dadsbee]

ECS has exact factory correct 383 HP head pipes. I know because they used mine OE's to make their jig !

 

[gtx6970]

The outlet diameter is MUCH larger on HP manifolds requiring different manifold to pipe gaskets and head pipe / flanges

 

[4mulas]

ECS has exact factory correct 383 HP head pipes. I know because they used mine OE's to make their jig !

Cool! And of course you get free exhaust for life for that right?