This is a carbed sled...no jet swaps. You have a power jet on each carb to balance stuff and then one jet on the intake tube...you adjust the intake tube if you make a radical change in elevation but I rarely need to. It actually has a huge range that it'll run clean on. The clutching is set-up so you don't feel much lag in the turbo...yes, every turbo has lag but it's pretty dang responsive. It explodes through a huge mid and holds track speed all day on top.