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1978 GMC K25 Moroso Ultra 40 Race Ignition Wire Sets 73602

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1978 GMC K25

Spark Plug Wires, Ultra 40, Spiral Core, 8.65mm, Blue, 90 Degree Boots, GM, V8, Set

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Whats exactly is the difference between "over the valve cover" and "under the header versions"? Is one a more factory routing? Also will these work with sock exhaust manifolds?

Asked by TRAVIS on January 03, 2019


Yes, this wire set will work with stock exhaust manifolds. The factory routing is usually around the perimeter of the valve covers, but our Race Sets route them either over the v/c or under the headers for a cleaner installation.

Moroso Moroso Answer - January 04, 2019

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Some parts are not legal for use in California or other states with similar laws / regulations

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