Does anyone know...........
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Joined: Aug 2004
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From: Colchester, Essex
Does anyone know...........
What the maximum boost is that you can run a standard sierra 4x4 ecu? i remember when i had my series 2, i turned it up to 10-11psi 
without a problem, and was wondering how much i could have with my sapph?? 
without a problem, and was wondering how much i could have with my sapph??
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