SkiSmuggs

Unlike the Ecoboost, naturally aspirated engines can loose low-end if you choose the wrong exhaust for it. Bigger is not always better.

MPETE

iTrader: (1)

the stock exhaust is a straight through design. unless you are doing it for looks/sound an aftermarket exhaust setup is a waste of money on a n/a truck.
as far as I can tell, 3.7 trucks do not even run a resonator from the factory, so its a pretty free flowing setup already.

wolverine030288

Mine had a resonator

KILOFINAL

The stock exhaust on my regular cab sounds great. Big difference from the exhaust on the Ecoboost equipped truck I had before which was very quiet

wolverine030288

I got a video on youtube
3.7 exhaust

BlueCornChips

I got a SCT tuner from 5* star last weekend. I started out with the 87 economy tune because I once I try the perf/tow, I may not go back! I plan to load it this weekend. Apparently I have good self control because I've been dying to try it.

I wanted to give the economy tune a proper test run and have used it all week. It holds gears longer than stock and shifts smoothly. Before I loaded the tune my display read 507km to E, after it read 672km to E. I'm not sure how that will actually translate in the real world but I'm sure it's definitely working as advertised.

My plan is to use perf/tow in the spring/summer/fall and the economy tune in the winter.

majikmike69

All the F150s exhausts have resonators on them at least 2011 and up.

papa tiger

Mine have the OEM Tow/haul installed and work nicely especially with E85 in hot weather. Recommend getting the tow/haul feature with any F150 out of the dealer lot.