Spark plug tubes.

motorpirate said

any value to them with headers, to protect the wires???

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I had manifolds and headers on my truck. Never had an issue. My dart has Doug's headers and a 5.9, also no issues.

I recently bought a '98 viper GTS. It has the same spark plug tubes that magnums had. It shares quite a few parts from the magnum engines ive learned! I removed the tubes when I changed plugs and wires. No issues there either.