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I Know CRT seems to be a popular brand for the HEI upgrade, but does anyone have any thoughts about Top Street Performance? They're very affordable on Amazon and have great reviews. Has anyone installed one of these?
http://www.amazon.com/Top-Street-Pe...ve&ie=UTF8&qid=1454042868&sr=1-1&keywords=hei
http://www.amazon.com/Top-Street-Pe...ve&ie=UTF8&qid=1454042868&sr=1-1&keywords=hei