Just picked up the FJ with the auxiliary fuel tank installed. Got the tank from Cruiser Brothers (Ward Harris) and they were great. The tank has added an additional 26 gallons of capacity which is awesome particularly when I'm out in the middle of nowhere. I had a 4x4 shop do the installation and it went very smooth. They did have to replace the exhaust as it was in the way but did not affect the spare under the bed.