The stock elbow does hurt airflow and performance, but it's not a big number. Since yours was ripped, it was worth it to get the aluminum one instead of the 1LE piece. As for the 58mm TB, it's really not any benefit until you are making in the 500 hp range so don't worry about that. Your setup looks fine, it just needs a supercharger and that elbow will be worth even more!
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