Here's what I've learned on this site: Flowmaster is better for a raspy, deep growl and flows better than stock, but is really just about average when it comes to flow rate/performance where as the magnaflows are straight through, which is better than flowmaster for performance. I just had a magnaflow 14" si/do installed yesterday, and I have yet to see a small difference in performance, however it sounds great. Now since you are looking for more of that mustang sound, I agree with the flowmaster choice because it will resemble that sound more than a magnaflow. I would recommend the maggie if you want a deep growl that is not intrusive in the cab and decently loud outside, but for what your doing, I'd say get the flowmastter super 44 (best flowing and deepest one they make) and run it si/do exiting the style of your choice. Hope that helps any.

 

check out my clip with the super 44 mines a 03 with the 5.4 4 inch tips. sorry about the powersteering whine you can hear. i got it fixed but havent made a new video yet

 

Hay King... Is that a SI/DO or true duals?

 

I have a 2002 SC 5.4 4x4 and with a k&n filter, ams oil, and i just made my side pipe exhaust a few weeks ago and i love it. sounds closer to my 89 mustang then any other AM exhaust system i have put on any ford truck. i just put 3 inch stainless pipe from the y-pipe right out to a set of baffled Harley Davidson chrome tips off of a newer F-150 that came in for some work. AND NO MUFFLER!! the 4 cats, (2 per bank till the y-pipe) I have notice all ready absorb a lot of the sound pollution. i have the tips coming out right in front of the RR tire and behind the running board. The sound is still clean, i have yet to hear it snap, it doesn't bother me at all in the cab, i have noticed more power through out the whole band, and better gas mileage when I'm not punching to hear it. Almost gives the truck a Roush look too.

If the shop has good customer service, you should be given the chance to hear it quick to get an idea. I know if you talked nice, we would do it at the shop I'm at. As long as we have the parts in stock, and you make it quick. But if you do get the chance, try it out with no muffler. I know i was surprised, and the price was right.

With what your looking to get out of the exhaust system, and spend, i would say its personal pref between the 3 options. to go real duals with an H-pipe, or an X-pipe would cost a fair bit to do it right, and you would want research it more, and think about future mods to make it work wile, like an intake, chip, headers, and so forth.

sorry for going on, but thst just my $0.02.

 

Its mainly a matter of preference in sound, but magnaflow does flow better. youre really not gonna notice a difference in performance with true duals unless youre draggin a huge trailer. i didnt notice any with mine. if u want the mustang sound you need true dual flowmasters with an H pipe.

 

Wow. It's hard to believe I started this post in April of last year and I'm just now getting to a point of getting estimates. I'm going to Midas tomorrow to get an estimate on converting to true duals with the Flowmaster Super 44's, H Pipe, etc. I'm looking at doing multiple mods so after this estimate I may have to pick and choose which ones come first. That said I have one last question about moving to this set up from the current stock set up. My understanding is that going to this set up should not hurt MPG but maybe even help a fraction. Is that correct?

 

^ not by much... Your not going to sound like a mustang period... The closest you can get is an H pipe with a pair of org. 40 and hi flow, or no cats, and no tail pipes! Loud yes, but that is a close to a stang as you can get.

 

Okay, first I said, "I would love to put dual exhaust on the truck with a really nice, low rumble much like that of the Mustang Shelby (I'm not looking for it to be identicle but just giving you an idea of what I'm looking for)." Not identical but similar. Second, your take on this seems to differ drastically from others in this thread regarding the sound and the structure of the system. If you are so sure they are all wrong then I am open to hearing specifically why they are wrong. So far everyone on here has been very helpful but your post seems less so and you didn't really answer my last question. If I am misreading your statement in any way I apologize. I have no real knowledge of exhaust systems and simply trying to learn.

 

Hey they will cost a little more than goin with just replacing the stock but get some true dual flowmaster. Ive only ran flowmaster and i beat out the sound of any other truck on the road anytime. I think youll be happy with the deep smooth toned rumble of the flowmaster.You cant go wrong and i know that the last time i did a muffler swap out on an f-150 for one flowmaster it was between Fifty and A hundred so for true duals shouldnt be too costly. Just get some quotes first and see what it will cost you from a couple diffrent shops and u can also check out some packages on flowmaster.com

 

Well...went to Midas today. They wouldn't quote true duals. They said there is not enough room for two mufflers and they were not comfortable with all the twists & turns they would have to create. So they would only quote SI/DO with a Flowmaster Super 44. Total price excluding tax? $850.00.

Wow!!! I'm starting to like the sound of my stock exhaust

 

Don't go to midas, Find a shop, and AV is correct btw.

 

$850 for a SIDO exhaust? are you getting longtube headers installed too?

 

I see you had the same reaction I did. I will be getting other quotes from local shops but thought I would start there first.

Please let me clarify something for everyone. I love the Mustang sound but I am not looking to duplicate it. I do not want people to hear my truck and turn around thinking a Mustang is approaching. I want a distinctive sound that is "similar" to that produced by the Shelby Mustang. I thought I had indicated that in my original post but it appears that maybe I didn't do a very good job of explaining that. I really do appreciate everyone's input.

 

How loud are you looking to go? A true dual 2.25" magnapack set-up would sound awesome. Look-up 4.6 punishers before he got hi flows

 

I'm not so much looking for volume as I am for sound quality if that makes sense. In other words when I jump on the gas then loud is fine but pulling up in the parking lot or light driving not so much. It wouldn't be too good for me to pull up in my suit/tie for a business meeting and have everyone's jaw on the floor. Just an added note...I will be adding a CAI and custom tune as well. I'll check out punishers.