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2.3 head on a 2.5

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Do I use a 2.3 head gasket kit or do I also need a 2.5 head gasket. Or are the head gaskets the same even though the bore is 2mm bigger?

Obx or fswerks header. Which one would you use and why?

Also my local track has a 90db limit. Will I be able to stay under that with a header?

Also is it better to wrap or coat the header since the factory one has that big heat shield around it?

Thank you.
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w/ my magic bag
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Do I use a 2.3 head gasket kit or do I also need a 2.5 head gasket. Or are the head gaskets the same even though the bore is 2mm bigger? I'd see what the difference is first. Whats the thickness?

Obx or fswerks header. Which one would you use and why? fwerks is a nice piece & ceramic coated.

Also my local track has a 90db limit. Will I be able to stay under that with a header? Use a stealth muffler & resonator or 2 stealth's= one into another.

Also is it better to wrap or coat the header since the factory one has that big heat shield around it? You wouldn't need to w/ the fwerks header.

Thank you.
[grinking]
 

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br/o/stang
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Unsure on HG

FSW and OBX headers and both knockoffs of the Cosworth. I had a OBX for years, fit great and lasted. Id buy another one in a heartbeat.

I wrapped mine and it helped with underhood temps a lot. Its stainless so no need to worry about rust

Not sure on the noise restriction. Mine measured at 93db with a OBX header and a 2.5" MBRP which had a resonator and muffler
 

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idobson, I am curious why do you want to put a 2.3 cylinder head on a 2.5?
 

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My understanding of VCT may be flawed (and please correct me if I am wrong here), but if the VCT solenoids receive no signal from the PCM wouldn't the cam default to the "neutral" cam position? So with that said couldn't you just leave the VCT solenoids in place and it would act like they were not there, as they would not be receiving a signal from the PCM?
 

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Keep the 2.5 head.
2.3 header works.
Run the Massive vct delete.
Run the stock Fusion/Escape/Mazda/Inlet manifold.

But you will need one of these items being discussed in this thread
So this is something you have done and it all worked ?

Tom
 
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