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The heads come with dual valvesprings (PN M-6513-A351), adjustable 1.73:1-ratio lightweight aluminum roller rocker arms (PN M-6564-A460), 3/8-inch hardened pushrods (PN M-6565-K460), pushrod guideplates (PN M-6566-C429), and 7/16-inch rocker-arm studs (PN M-6527-A341).
460 Cobra Jet SVO Crate Engines

 The heads come with dual valvesprings (PN M-6513-A351), adjustable 1.73:1-ratio lightweight aluminum roller rocker arms (PN M-6564-A460), 3/8-inch hardened pushrods (PN M-6565-K460), pushrod guideplates (PN M-6566-C429), and 7/16-inch rocker-arm studs (PN M-6527-A341).  View Related Article

 

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