I bought the Proflash made by Street and Performance Products. Made a big difference in the performance of my H2. I bought mine at www.calcarcover.com, they do not show it in their catalog but if you call them they can order it. I only paid $310.00 plus shipping. This is the same programmer that Whipple Supercharger sells for over $500.00.
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03 H2 Sunset Orange Magna Charger w headers & cold air intake, 4\" Rancho lift, XTC Light Bars Front & Rear, 4.56 gears with Eaton Front Locker
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