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Old 11-09-2009, 10:03 AM
RANDY CARTER RANDY CARTER is offline
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Join Date: Aug 2004
Location: KERNERSVILLE, NC
Cobra Make, Engine: SUPERFORMANCE-ROUCH 351W
Posts: 31
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What type of motor mounts do you have? I had the same problem on my SPF and SB Roush engine and it turned out to be only the motor mounts. If you have the very hard neoprene mounts instead of the softer rubber mounts this could be your problem. Hopefully you don't have an engine problem and just don't drive at that RPM to eliminate the vibration.
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