cant feel much but i could tell slightly. with the smarty i could tell more. for 70 bucks i would say its worth to buy!
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04.5 3500 1 ton/auto/SMARTY TNT
/Quad boost fooler & commander/ice box intake & COOL hose/GDP intake elbow/FASS 150/straight through 4inch duals/L.E.D lights everywhere/custom cut rocker panels/18inch rims/fender flares/alpine stereo system/coming soon: trans work