I wonder if "true dual" exhaust would sound good ??? OR would it sound twice as bad !!

I think a true dual exhaust on this motor would sound bad, imho. V8s sound fantastic with that setup, with a nice little x-pipe in the middle, but not on this motor.

Solid advice. Aluminzed is fine for dry climates/vehicles that are more pampered ie muscle/sports cars. Look to a SS muffler and/or a SS system. Many companies are now offering lifetime warranties (something we have been doing for years) hold on to that receipt though. Good luck on your choice.

Ok, what about buying the SS muffler of my choice and getting some SS tubing to replace the resonator. What size exhaust is on the stock ecoboost 2.5" or 3"? Do I purchase t304 or T409?

Exhaust system material thickness should be no less than 16 gauge- double-walled pipe was commonly available through the 1970’s until manufacturers began seeking ways to reduce costs. Many of the “Muffler Chains” who marketed lifetime warranties always used double-walled pipe before “stainless steel” became the “in-crowd”. If a shop had it available, I would choose double-walled aluminized coated steel or 14 gauge stainless steel (depending on environmental conditions or personal tastes) - it is very quiet, solid and in terms of costs, pipe is pretty cheap, depending on length, 16 gauge aluminum coated runs about $11 to $20 wholesale (depending on diameter), stainless about double for the same gauge.

OMFG!! :-X14 ... that is the lamest truck sound I have ever heard. Ford got it right guys, the Ecoboost should be seen and not heard.

I think the stock exhaust is just under 3" OD, at least it is at the tailpipe.

T409 is preferred because a bit easier to work with but T304 is good as well. We use a lot of T409 in our systems. Not too sure on the stock size honestly yet, haven't seen or got the info yet. Often people with newer cars tend to care more about their vehicles so go this route. I also know lots who just cut out the stock muffler and throw in the appropriate muffler to open up the system. Keep that receipt close.

With my Grand National (3.8 turbo V6) with mild to moderate cam and stainless steel 2.5" straight through type muffs its sounds great at idle. Like a nicely cammed small block with some compression. But off idle its just ok because its a V6. On boost however its actually quieter but sounds great because you can also hear the turbo. Having a good blowoff valve(s) that lets you hear the turbo(s) is possibly more important to getting some head turning big grins sound.

You don't need more than a 3" downpipes and 2.5" straight thru type muffs to get to the point of a near zero backpressure or loss system unless you making over an honest 500HP.

Grand National :-X07 One of the first cars I drooled over in a garage in my early 20's. The kid was so privildged and so cool to hang out with.

Let's not forget there are twin turbos on the EB motor, and running a single 2.5" pipe would most likely produce some backpressure. The stock pipe diameter is almost 3", so why go smaller?

Downpipes plural, muffs plural, nobody said anything about routing it together into a single pipe. :)

Indeed Vern...yet nobody said anything about 2.5" on dual pipes either. Still..why go smaller than what's on the truck now?

I think the magnaflow 4" system is fantastic, just not the choice of materials. So if you're making your own, why not mimic that system with better piping of your choice rather than routing true duals, of which most will be custom bends and fabrication?

sound is a benefit but 40 hp and 50fl/lbs of torque is a reason. no exhaust system in the world can do that to a naturally aspirated v8. PS it may not sound like a v8, its sounds powerful instead.:-blah

I personally don't like the sound of a piped V6, never did, but do own a egoboost and just love passing the V8 guys like they are missing shifts.

Is there an aftermarket pipe/muffler combo that will release additional power without the additional sound for the EB?