The lowest bolt on the manifold is best removed from underneath the truck. I used a 3/8" Drive Socket wrench and a 10mm Snap-On Shallow socket. If you have a second set of hands they would be great from up top of the engine bay to help steady the wrench. If you keep the socket centered on the bolt head, it should come out with a little bit of torque. Be sure that the bolt head is clear of rust and debris. This was the main problem I ran into. I thought I stripped the bolt head while trying to remove it in the engine bay. Upon inspecting the bolt head from under the truck I noticed rust so I blew that area off with a blow gun.
Some extra tips and pointers to ease the removal and installation of EGR delete kits.
*2 sets of hands and eyes are a plus!!
*liquid wrench, air tools, impact wrench, nice box wrenches and patience
*Drain Radiator Fluid properly and check for contaminants
*I loosened the Front/Top Radiator support for more room to work
*Cover Intercooler, and other coolers while working around the engine bay
*Remove the drivers side wheel well shroud
*Work your way from the top of the motor down
*Segregate and organize nuts, bolts and parts and label them if you have a bad memory!
If anyone has any other questions or concerns let me know