TBI spacer is useless Won't change anything except make you wallet lighter.
If the exhaust is currently in good working order, there will not be any
improvements in power or efficiency.
A high flow intake is the only thing that's been shown to increase power.
Increased power = increased efficincy = better fuel mileage.
When I put one on my 5.9, I gained about 1 mpg. It will take a lot of
make it pay off.
The bottom line is, the truck is what it is. There really isn't anything
effective you can do to get better mileage except change your driving habits.
you plan on putting another 80-100K miles on that truck, it's cheaper to just
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