Thread: Roush 427 & 402 Differences
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Old 03-02-2009, 04:56 PM
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BRYCE BRYCE is offline
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Join Date: Jan 2005
Location: Dana Point, CA
Cobra Make, Engine: SPF #2056, 515 HP ROUSH 402R
Posts: 69
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According to the specs, 402r and 427r are very close. Idle is right on at 1200 rpm for mine. Roush makes a great engine. Very happy with mine over close to 8,000 mile
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