This is the 4" pie cut intake kit. For anyone running in one battery or those who have relocated their batteries this makes for a very cost effective, clean, and awesome looking intake if you like welded parts. The main reason for the pie cuts are to safely clear the alternator. All of the joints/transitions are hand fit/prepped and welded for full pen and a very smooth transition. The degree of angle has no harmful effects on airflow and picks air up from the front area of the truck which really helps with keeping air intake temps lower which results in a denser air charge and more power/lower egts. Kit is for 4" inlet turbos, it comes with a new boot and clamp, I can also supply it with a 5" s and b air filter with the correct adapter boot. Thank you for your time! If you have any questions please feel free to message me.