The 4L80EPP2 includes everthing that makes the level 1 great such as high energy frictions, and dual feeding the direct clutch as well as extra roller bearings. Level 2 adds a billet input shaft, and well as forward hub for higher horsepower applications. This transmission should safely hold 1000 horsepower! All units come with FREE SHIPPING to the lower 48 states, and no core charge! please note if you need 2WD or 4WD transmission. Please email email for lead times, as we don't always every every transmission in stock, but most units will ship within a week. one year UNLIMITED mile warranty!