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  1. Engine
    hi, please help and advice my poor GTR35 09y R35,35,000 mile, stock intake with full exhuast (inc downpipe), using cobb beta2 v500 93 octane and that was okay since 6month ago however a month ago, i felt something wrong when i full throttle(17.5psi) over 5500rpm(sometimes 6000rpm), it feel...
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