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In stock form, TBI Chevy 454s are slightly more impressive than a Florida swamp turtle when it comes to speed. But Richard treated his big-block to an Air Raid intake, dual Flowmaster exhaust, and a Superchip controller. When we asked what his results were, he said that he wouldn't change a thing since not only does the controller wake up the big-block, but it also allows adjustment of the 4L80E. With the power to spare when spinning big tires in deep mud, we'd be happy too.