the quad box is just a timing box the edge box does mild pressure...i wouldn't see any reason not to go with either of them aside from the fact the quad is cheaper and internet upgradeable to a race box I believe
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Duane Henrie
06' Cummins 472HP 935TQ
"Any man who says he is an American, but something else also, isn't an American at all. We have room for but one flag, the American flag"
Theodore Roosevelt 1907