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mods power vs. fuel 2500 sierra
so I am wondering if the parts that I've scouted will help only with power or also with mpg?
- superchips flashpaq tuner
- k & n 77 series cold air intake
- Pulstar Eco-MPG Series Spark Plugs
- BBK Performance Exhaust Headers
Also if anyone knows mods that will for sure add mpg for this particular vehicle I would love to know.