panheadindy

There are no sensors on the 06 5.9 maybe you are thinking of the new 6.7 ??? They have a bunch of sensors to keep DIY's from touching it. I removed the muffler but left the cat on mine. Its a little louder then I would like but it is not bad. You will not see much of any benefit from doing this unless you do something with the air intake also. You may pick up 1 or 2 mpg if you are lucky and your egts will drop 50 - 100 degrees from what they run with the muffler.

I cant tell you too much about the 99 but on the 06 auto I would address the fluid flow in park and check valve in the cooler line before spending money on a pan upgrade. The 2006 should have a 48RE trans. The stock configuration does not allow fluid flow in park so no idling in park or you will heat the trans and slowly cook the fluid. Adding a Sonnax Pressure Regulator Valve and Sonnax Manual Valve will correct that. There is also a check valve in the trans cooler line up by the radiator. This should be removed as it is a known cause for trans failure if it gets stuck or lets go. These are all cheap mods and do not increase the power the trans can hold but help for longevity. The aftermarket pan is nice but I wouldnt shell out the cash for it unless you do mainly towing.

I have the Frantz oil filter but have not installed it yet. I am not keen on drilling a hole in the oil pan and do not really want to use the oil fill cap. Where is the plug you refer too? Would the second port on the oil filter work as a return point? I thought they were both high pressure.

Is there any confirmed information on better mpg with a injector upgrade? I have read alot of posts that claim better mpg but it doesnt seem to make sense a larger injector would increase mpg. It is my thought for example a 50hp above stock injector would have a larger opening and work well at higher rpm but not as well as stock if you are driving for milage. The fuel droplets would have to be larger under low load conditions from the larger injector. That would be counter productive to complete combustion and not better for mpg. The site is coming along nice alot of good information there.