exhaust manifold power rating

[Dalton]

how much power should these be good for? (pic isn't mine but I have the same ones)

 

[sintax]

I've been told those are some of the better performing basic manifolds before you start to get into the high dollar aftermarket ones. I dont think I could give you a HP figure where they start becoming a restriction.

 

[Dalton]

bump....


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[Gugs]

I can tell you that using the nicson with the larger tips to TT headers netted 7mph on a solid roller , 9:1 ,496. Assuming jet - 20hp per MPH increase, the upgrade was worth 140HP to the same motor.

If a mild 468, you can run the ones in the pic. If more that that, you'll be better with better exhaust.

 

[Dalton]

what would be a good upgrade from these?

 

[sintax]

what would be a good upgrade from these?

Imco Powerflow
Lightning
CMI