I tow with a 2012 Ram 1500 Express 4X4 5.7L Hemi with tow package and Husky weight distributing hitch, tonnoue cover, Vararam cold air intake, Magnaflow 14" muffler and Bullydog Hemi Gt tuner and Michelen LTX AT2 tires. Stock is 385 horsepower and I figure I'm running close to 410 or so. The tone from the muffler is not offensive and the throttle response now is much better than stock; the engine does not get hot and feels darn near effortless up grades. I sort of feel now that less is more so I haven't gussied up my truck other than the tonnoue cover and hood deflector. Plenty of power for our 2013 25' FR Surveyor SP220 at 5000lbs loaded. Gotten as good as 23 mpg solo and 12 mpg consistently towing with as high as 15mpg on flats. Nice rig; if I got a heavier or longer trailer next time, I will upgrade to a 3/4 ton vehicle and possible diesel.
2013 Forest River Surveyor SP220 Sport
2012 Ram 1500 4X4, 5.7L Hemi quad cab