With no other mods and only 5 lbs of boost, this SLP kit picked up this 2014 5.3L Silverado more than 100rwhp! The final numbers were 420 rwhp & 426 ft/lbs tq. These kits are very rare, with SLP having only offered a handful of them. We had pulled this kit off of another Silverado that was swapping it for a Magnacharger. Probably both the first and last SLP centrifugal kit we will see!