[Gave_up_my_Bowtie]

Well I had a little extra time on my hands this month so I thought it would be a good time to do some dyno runs. I'm not claiming to be an expert at engine tuning nor on the products tested so take this material for what it's worth. I have a crewmax 4x with the 5.7L engine with almost 9k miles running Mobile 1 oil. My truck has bigger tires so for you who think the numbers are lower than expected take that into consideration. I had asked the operator of the dyno if the tires made a differance and he didn't think it would make much. I had a number of pulls performed on my truck with different configurations. Another thing to keep in mind is our elevation here is just over 1000 ft above sea level.

1) Stock truck
2) K&N cold air intake with the stock exhaust
3)K&N cold air intake with a JBA dual exhaust
4)K&N cold air intake with a JBA dual exhaust and opening a vent between the Mass Air Sensor and the Throttle Body.(to try and lean out the truck)

My personal experience is that the K&N made a noticable differance in drivability and performance. I think this mod was worth the money.
The exhaust would have worked better if their was a way to lean out these trucks (programmer, adjustable mass air sensor, etc) as for drivability with the exhaust I feel that fuel consumption has increased without running the truck any different.

On one last note GO TRIBE......