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  1. Tumble flap delete IMRC

    DURATEC Performance (2003-2007)
    I have a spare intake manifold now for my D20 and am considering removing the IMRC valves and want to hear from those who have done it and if it's worth it. I figure it's something cheap/free and I have the SCT PRP so I can tune to adjust for it. However, if it does help with performance I'll...
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