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Thanks guys. This gives me so much direction. I will look it up and get my dinan tune removed. I've heard very good things with JB4, especially with meth injection. My buddy's got meth injection on his 87 Grand National and he was able to to go from 18lbs boost on 93 octane to 24lbs boost on 89 octane with no indication of knock. Pretty impressive numbers even on old school technology. My history with Cobb has a big draw, Cobb never gave me any issues......hmmmmmmm.
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