C&L "Stage 3" package consists of the same items as the first kit, but with a 4 psi lower crank boost pulley and correct belt. This gives the Harley truck a total boost level of approximately 2 psi over that of a stock Lightning. Do not confuse this with a Lightning truck that has been fitted with a pulley for 4 MORE psi than stock, as that setup brings you to a level of boost that would require a much lower level of timing if you were to safely tow or use the truck for utitlity purposes. We feel that the level of boost that this pulley gives is ideal for the typical daily driven Lightning truck. Raising the boost higher would certainly help the low RPM torque a little in the first gear when you first floor it, but the peak horsepower would not be much better due to the fact that you would have to keep the timing level low for the octane of the fuel and the weight of the vehicle. With the "Stage 3" package installed, the average rear wheel horsepower is increase by 50, with the peak torque and peak horsepower gains coming in at a whopping 75 over stock.