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Old 03-30-2024, 12:06 PM
roy381 roy381 is offline
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Default Better gasket

I'm replacing my intake on my 461. I bought new Fel-Pro gaskets. After removing the older gasket also, a Fel-Pro. I noticed it is a lot stiffer than the new one. They have different part numbers and shape but still cover the same. Would it be wise to buy and use the stiffer gasket?

Thanks, in advance.

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Old 03-30-2024, 12:49 PM
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Formulajones Formulajones is offline
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I don't know about stiffer being any better, they do make a few different styles of intake gaskets and some are a bit flimsy in comparison.
I have noticed some different quality issues with Felpro on a more recent intake gasket purchase that caused me to buy a different set from AFR.

When the bolt holes were perfectly aligned all the intake ports were shifted over 1/4" !! That's not going to work.

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Old 03-30-2024, 01:21 PM
roy381 roy381 is offline
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The quality of the old gasket just seems better. But I'm a novice and really don't know if it matters as compared to someone putting an engine together more frequently.

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Old 03-30-2024, 02:15 PM
Joe-Touring Joe-Touring is offline
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Most important thing is fit. There are a couple different exhaust crossover iterations and port sizes. Just try to match everything up. Fel pro also has a fancy “Print-o-seal” set that has a bead of silicone around all the ports.

If everything lines up, you should have no issues either way

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Old 03-30-2024, 07:25 PM
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FelPro High performance intake 1233
RAIV that is fairly stiff FelPro 90123
SCE has some good intake gaskets all different sizes.

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Old 03-31-2024, 10:56 AM
roy381 roy381 is offline
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Thanks folks, The Fel-Pro 1233 is the one I am using and everything lines up good.

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Old 04-01-2024, 01:28 AM
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The FelPro 1233 gasket is a good choice for RAIV sized ports. If these are aluminum heads and a quality manifold they will fit great. If you have standard ports and a cast iron manifold (or an aluminum manifold with ports that don't align all that great) you might check that the intake seals properly against the 1233 gasket.

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