fl means that the bike has floor boards and not pegs, h means that it has a windshield or fairing installed and x stands for street glide.
Street Glide
2006
The Harley Street GLide, FLHX/I was first introduced in 2006. In 2005 the Harley Road Glide Standard, FLHT/FLHTI was similar to the Street Glide.Hope this helps!Dave
25 mm
Harley-Davidson motorcycle company recommends a tire air pressure of 18 pounds for the street glide model. Substitute tires may require a different air pressure.
4 qts
One can find reviews on a Harley Davidson FLHX at CycleTrader, BikeSales, MotorcycleUSA, JCWhitney, TopSpeed, SalvageBikesAuction and of course, where else but Harley Davidson itself.
I have a 2010 SE Street Glide, Vance & Hines dresser dual headers, Rinehart 4" mufflers and a Power Commander, rest is stock. It has 88 HP and 110 Ft Lbs of torque. I just got it off the dyno.
2006
Yes.
10.8 each side in my 06
I have a 2011 street glide with a 103ci motor. I had the stock pipes replaced with Bub7 true duals and I added a Roland Sands breather with a Power Commander 5 and it dyno'd at 85HP and 103 pounds of Torque. The tuner said a stock Harley usually is around 75HP. I have a 2012 street glide(FLHX) with a 103ci motor. I had the stock pipes replaced with V&H Dresser Duals and I also added a Roland Sands high air flow breather with a Power Commander V and it dyno'd at 80.99Hp and 102.86 Ft. Lbs of Torque. The tuner said a bone stock 2012 Harley usually is around 68HP due to having a catalytic converter.