Your correct on the heads, the crossover is there to preheat the air/fuel for cold weather driveability. Depending on how much you drive the Airgap might give you fits during cold weather.
cylinder head help
I'm looking at either the edl. performers or the performer RPMs to bolt on my street driven 350. It seems the only difference is the heat crossover. Is it something that's needed? I would also like to run a performer air gap to top things off, but I don't think it has provisions for the cross over. Just wondering what difference the cross over makes if any. Any advice is greatly appreciated.
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