flowmaster dual kit

[silverbackexpo]

Hey guys I brought this mandral(spelling) bent dual exhaust kit from flowmaster for 100 bucks an I need to know if I will need any type of muffler an how much of a loss of bottom end torque am I looking at because I still have all four cats. So people with the exhaust systems let me know wat u guys think.

 

[panda24619]

does NY require a muffler for smog? if not then straight pipe it. if not then go with a bullet performance muffler. i think i am the only expedition with one. i love the sound. i am going to be putting one on my new truck when i get one.

 

[Thermo]

silverback, choosing a muffler is kinda like asking what your favorite color is. Everyone has a different opinion on what is good better best.

Having all 4 cats still installed is going to open up your options as you can go with a slightly freer flowing muffler since your cats are going to provide the necessary restriction (ie, backpressure), which will then help keep your low end torque. But, this is not the cure-all either. You still need the muffler to provide some backpressure too.

I have a Flowmaster setup on my truck. I am running dual 2.5" tubes all the way from the exhaust manifolds back. I have the tubes equalized using a dual in/dual out 70 series muffler with 2.5" inlets and outlets. The volume of the exhaust is slightly louder than stock at idle and is noticeable under hard acceleration, but not one of those attention grabbing volumes either. I can still chirp my 37's with this exhaust using the 1st gen 5.4L motor (non-PI) with no real power adders (ie, chip, supercharger, etc).

I guess you need to ask what is more important to you: a certain sound in the exhaust, maximizing power, or maximizing fuel efficiency. You can only get 2 of the 3.

 

[BakerEdition]

Hey guys I brought this mandral(spelling) bent dual exhaust kit from flowmaster for 100 bucks an I need to know if I will need any type of muffler an how much of a loss of bottom end torque am I looking at because I still have all four cats. So people with the exhaust systems let me know wat u guys think.

did you ever find out if those cats were plugged?

 

[Shadowless127]

does NY require a muffler for smog? if not then straight pipe it. if not then go with a bullet performance muffler. i think i am the only expedition with one. i love the sound. i am going to be putting one on my new truck when i get one.

NY does OBDII testing, where they hook up a glorified code reader to the car and check to make sure the required amount of monitors are set, and that there are no freeze frame MILs present (you can still pass if you have pending codes). HOWEVER, they are supposed to do a visual inspection of your emissions/exhaust system. You can get by this by knowing someone...

 

[BakerEdition]

they do emission testing here in Tennessee...I went for my plates and had to get a emission test...had my programs set in my Edge on the truck and even with all the mods i have set in the programmer it passed with flying colors...

 

[Shadowless127]

they do emission testing here in Tennessee...I went for my plates and had to get a emission test...had my programs set in my Edge on the truck and even with all the mods i have set in the programmer it passed with flying colors...

As long as your engine is in good running condition there is no reason it won't pass an actual smog test.

 

[silverbackexpo]

Thanks everyone. And no not yet about the exhaust but when I put my hand by the muffler it seems to be steady except for the miss in the motor bakeredition