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Boost Control Isolator Bypass Plate For Mercury 450R/500R (8M0162821)
Description
On the 450R/500R this Isolator bypass plate is located between the intake manifold plenum and the boost control valve or also know as a 2nd throttle body. This is a common spot that can cause a boost leak which will have a signify amount of power and efficiency loss. Replace your faulty part with this OE part.
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