The Toyota 4Runner is an impeccable off-roader, but it's also a capable hauler - which configuration can tow the most?

If you've scrolled through truck forums or chatted with DIYers at a trailer park, you've probably heard someone say they "upgraded" their truck's towing capacity. Is that possible? Well, not quite.

There are plenty of pickup trucks on the market for the average Joe, but for those that desire the most capable haulers possible, there are heavy-duty trucks. This strong segment of extra-large trucks ...