I have added several engine modification to my H2.
1. SMA airaid cold air intake
2. The Other Guys Headers
3. Flowmaster muffler made specificall for HD series trucks.
4. Proflash power programmer.
5. 180 degree thermostat
Each component added more power to my H2, but when you add all these components together the difference is quite a bit. I drove my friends stock H2 to compare it to mine, and I was amazed how better my H2 runs. As an added bonus, I also picked up 2.5 MPG.
Unfortunitely I drove a H2 with the Magnacharger and was blown away. The power was endless, so I will probably be going that route.
Kirk
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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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