I got about as much power from my MAF cleaning as I got from switching my 4.6 gears out for 5.14 gears... pretty substantial.

My truck is DRIVEABLE again. I got on the freeway briefly and going slightly uphill at 70mph on a windy day in overdrive I was able to not only maintain speed - but also accelerate a little while still keeping it in overdrive.

Too bad I didn't notice this 3 YEARS ago when I went through the mud that fouled it. I've driven 50,000 miles with a de-powered truck