I picked up about 3 MPG city (sorry no highways on the island) by dropping the anchor of a factory muffler, and installing a 18" glasspack midway down the exhaust pipe. The only other gain I got was about 1 MPG from the AEV ProCal correcting shift points.
I'm back up to 15 City now, from...
They've been out for years. I'm running them now in 265/75, and they've worked well in the dry stuff of SoCal, but now that I'm in the PNW they'll be replaced with an MT, They just don't handle the mud well enough, but no AT really will.
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