Funny how both of our sig pics are only about 500 yards away and yet they look so different! Anyone else notice a gas mileage drop when you put the DTLT Headers on? I am down to 10-12 mpg on the freeway at 75mph and it is killing me. I have the DTLT headers, a custom y-pipe that has 18" resinators instead of the small cats and a Borla muffler for the exhuast side and a snorkel that goes into a AFE sealed intake on the intake side. TRD thinks that my truck is just begging for a S/C? And that it would raise my gas mileage up 5-6 mpg. Anyone with any experience in this department have any ideas? Oh and I am on 295/75R16's, factory gear ratio of 3.73, automatic and have lots of weight and no arrowdynamics....
You can also try resetting your ecu, by disconnecting your battery for about 10 minutes. If you hadn't after those parts installations.