CSF Intercooler 99-03 Ford Super Duty 7.3L Turbo DieselThe CSF high performance intercoolers drastically reduce charge temps versus the stock intercooler, especially on cars running a higher level of boost than stock. A stock intercooler struggles to cool the more compressed, thus heated air leading to higher charge temps and a decrease in BHP. CSF intercoolers are designed with a stepped core design for maximum surface area contact and internal air flow volume. Fitment: 99 03 Ford Super Duty 7. 3L Turbo