I have installed many intakes on the various performace vehicles that I have. I decided to buy the AFE Stage 2 SI with a PG7 filter after doing much research and speaking with my buddies at Left Coast Diesel. Here is what I learned.
Fit and Finish: The AFE parts are very well built. Nothing on the unit looked cheap. All the parts were included and with some extras like gaskets for the MAF.
Install: Install was pretty quick, took about 45 minutes. The only tricky part was attaching the intake tube to the turbo. It was easier to put the coupling on the turbo first then place the tube on it. Then connect the air box to the intake tube. Tighten everything once it fits right. Also, the MAF sensor wire was too short to reach. All you have to do is pull it out a little, like 3 inches, from the tidy wire set up from Ford that has electrical tape over it. Then re-connect the MAF. The metal intake channel fits well over the battery and lines up with the airbox neatly. There are no additionaal tuning needs and nothing needs to be adjusted unless you run a tuner. So far no codes tripped and supposedly this new intake does not trip the codes like the other ones. Not sure why though, but again so far no codes.
Performance: Once tightened, I turned the truck on and noticed a different sound. You can definately hear the intake air difference. On the road, with the windows down, the truck does sound throatier unde acceleration. aAt idle, the truck sounds normal from the tailpipe area. I definately can feel the difference in throttle response. As far as MPG's, I have put two tanks through it and have an increase of 1.4mpg. I am now up to 14.6mpg. This was all hand calculated. The only thing on my truck is a DPF back MBRP exhaust. I am planning to put a HS Mini Maxx tune on it to round it out.
Last edited by Wtrski413; 04-23-2011 at 12:45 PM.