I have been running 37" tires for about 45,000 miles on my H2. I recently changed the gears to 4.56 and it made a huge difference. My H2 is running the Magnacharger and while it had a lot of power before the truck a lot better now.
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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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