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I installed the K&N intake kit on my 94 4.3 Vortec and noticed an increase in the higher rpm range. I also installed an underdrive 3 piece pully set and noticed a hugh "hole shot" differance. In addition to that I installed a high flowing cat and muffler with 2.5" pipe. I don't know how a change in exhaust will affect your 2.2 engine but it shure helped bring my 4.3 to life.
Good Luck
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