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Old 03-26-2006, 08:17 AM
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392cobra 392cobra is offline
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Join Date: Feb 2002
Location: Devil's Backbone,RR 32, TX
Cobra Make, Engine: Lone Star Classics #240,Candy Apple Red,Keith Craft 418w - 602 HP,584 TQ
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"I figured since the intake and exaust valve size was the same it should be good to go. "

That could be where the difference is.

I had the M--6007-D392 w/ GT-40 heads (M-6049-X303).These heads come with 1.94" intake and 1.54" exhaust.

The AFR185 is 2.02" and 1.60".

Last edited by 392cobra; 03-26-2006 at 08:24 AM..
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