What to upgrade next?
What to upgrade next?
I know this has been asked before but each person truck have diffrent mod's to start off with. I have a K&N air kit, JetChip and Flowmasters. What should I consider next? Whats best for fuel mileage? And does anyone know which O2 sensors to replace for better mileage i'm getting about 13mpg. 1999 4x4 5.4L
For performance, I would go with an underdrive pulley set. Personally I would stick with the OEM oxygen sensors. For gas mileage, using a bed cover helped my beast. You're never going to get Hybrid Honda gas mileage from your hunk of steel, but maintaining tire pressure, keeping her tuned, and clean filters/pcv blah blah will give you the best results.


