N52 to N54 Manifold Eccentric Alignment Inserts

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Optimize performance with our N52 to N54 Manifold Eccentric Alignment Inserts. Made from injection molded Nylon, these inserts provide a precise fit for your N54 manifold on your N 52 engine. This results in improved high RPM range airflow and eliminates the need for ever-failing disa valves. Each pack contains 6 inserts for accurate alignment of intake runner tubes. Show more