KC 6.0 to 7.3 Intercooler Retrofit Kit   Features & Details: 4 Constant Tension Boot Clamps Extra Thick Multi Layered 8" Boots Cooler EGTs Lower IATs Reinforced To Handle 150+ Psi High Flow Cast Aluminum End Tanks 100% Drop in ready TIG Welded Bar & Plate Core  Watch Install Video HERE Description: Upgrade your 1999-2003 7.3 Powerstroke by swapping the original intercooler for the larger 6.0 Powerstroke style unit, enhanced further with the KC Upgraded Intercooler. This custom intercooler boot kit allows seamless installation of a 6.0 intercooler into any Super Duty 7.3 Powerstroke, delivering improved cooling performance and efficiency. *Installation of this intercooler on a 7.3 does require the modification of the factory transmission cooler lines or use of a 6.0 Powerstroke transmission cooler. *Can be installed on a E99 with some modifications.