Thread: Difference in 427MR and 427HR
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Old 07-16-2007, 03:35 AM
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FFR428 FFR428 is offline
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Join Date: Oct 2002
Location: Fairfield, CT
Cobra Make, Engine: HM-2027 / 427 SO
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Wow thanks pretty cool!! Nice to know some history on your parts. My heads are just lowly over the counter parts.

G.
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