X or H pipe for added power and deeper tone? - Ford Mustang Forum
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post #1 of 66 (permalink) Old 01-04-2013 Thread Starter
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X or H pipe for added power and deeper tone?

I have been all over back and forth trying to decide what to do to my exhaust on my new 2013. I did not fare well with my choice of Dynamax on my 2011 and want to make the right decision this time. I think I am going to just change tips on the stock exhaust and add a X or H pipe. I read that the H pipe gives a deeper tone but X gives a tiny bit more power? I ABSOLUTELY do not want to do anything that makes it LOUD but louder than stock and deeper is certainly desired. Of course drone is unacceptable which is my problem with the Dynamax setup.

1. How much power can I expect from and X pipe and how will the sound change with stock mufflers?

2. How much power can I expect from and H pipe and how will the sound change with stock mufflers?

3. Do I have to go with an off road set to get more HP or will a good high flow cat setup give good gains? If so, which one is best?

Thanks!
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post #2 of 66 (permalink) Old 01-04-2013
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I think the first question is what price range are you looking at? I have looked into the "perfect" setup for my 13 as well. So far I have the borla S axle backs. I really like them but want to get rid of some of the rasp and get the deep 4.6 sound. H pipe is better for the deep muscle car sound, X pipe will add rasp and more "race car/ ricey" the borlas have absolutely 0 drone anywhere in the power band. Loudish when you get on it... quiet as stock when cruising and pops a bit when you let off the throttle.

I have looked at ALL KINDS of youtube videos and can't quite find what i am looking for. I have thought about the boss H pipe to go with my borlas but can't justify the price.

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post #3 of 66 (permalink) Old 01-04-2013
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Quote:
Originally Posted by LandToSea View Post
I have been all over back and forth trying to decide what to do to my exhaust on my new 2013. I did not fare well with my choice of Dynamax on my 2011 and want to make the right decision this time. I think I am going to just change tips on the stock exhaust and add a X or H pipe. I read that the H pipe gives a deeper tone but X gives a tiny bit more power? I ABSOLUTELY do not want to do anything that makes it LOUD but louder than stock and deeper is certainly desired. Of course drone is unacceptable which is my problem with the Dynamax setup.

1. How much power can I expect from and X pipe and how will the sound change with stock mufflers?

2. How much power can I expect from and H pipe and how will the sound change with stock mufflers?

3. Do I have to go with an off road set to get more HP or will a good high flow cat setup give good gains? If so, which one is best?

Thanks!

A little off topic, but I wouldn't give up on all axle backs so fast. I know you've already spent money on the Dynomax and probably are hesitant to try a different make. I like the tone my Corsa's make (although there are others that sound a little better on youtube) I can't make any sound that I would even consider drone. The only noise someone could consider drone is under low rpm high load (1500 or lower and near or full throttle), which is outside of something I would consider "normal driving conditions", even then it sounds like it's more and intake boom sound than drone.

If anyone near you has a set of Corsa's I'd suggest seeing if they will take you for a ride, or for that matter anyone close with a different axle back that they think doesn't drone.

It may not be cheap but from what I've heard the stock axle backs don't sound good when you start to change things up stream.

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post #4 of 66 (permalink) Old 01-04-2013 Thread Starter
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I am going with the FRPP Sport WHEN I do the back end of the exhaust which will be down the road when I get a SC. For now I just want performance gain and a deeper tone if possible. From what I have read axle backs have negligible influence on gains? I guess my real question is how does H pipe, X pipe and aftermarket high flow X pipes w/cats compare in gains and sound without any other exhaust changes? I would prefer to have cats for the environmental aspect if possible to get similar gains than without.
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post #5 of 66 (permalink) Old 01-04-2013
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Originally Posted by LandToSea View Post
I am going with the FRPP Sport WHEN I do the back end of the exhaust which will be down the road when I get a SC. For now I just want performance gain and a deeper tone if possible. From what I have readt axle backs have negligable influence on gains? I guess my real question is how does H pipe, X pipe and aftermarket cat pipes compare in gains and sound without any other exhaust changes?
Oh ok, yeah they where my 2nd choice when I got mine. Sorry no real help from me on the mid pipe since I don't have one.

This is something I might do down the road though.

Are you looking for something you can buy and install or a custom setup? The only H-pipe I've seen made for our cars is the Lethal off road H.

You've probably seen this, but if not here's a couple clips of a off-road H with MRT mufflers.

Outside
2012 mustang v6 MRT drive by with h-pipe.wmv - YouTube

Inside
2012 mustang v6 MRT exhaust with Lethal h-pipe - YouTube

I love the way it sounds outside but the inside is way to raspy. Not sure if it's just the camera or what.

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post #6 of 66 (permalink) Old 01-04-2013
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LandToSea - Did you have the Dynomax VT mufflers? I'm told they're drone free.

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post #7 of 66 (permalink) Old 01-04-2013 Thread Starter
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No, I have the 39507.
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post #8 of 66 (permalink) Old 01-04-2013
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Quote:
Originally Posted by LandToSea View Post
I am going with the FRPP Sport WHEN I do the back end of the exhaust which will be down the road when I get a SC. For now I just want performance gain and a deeper tone if possible. From what I have read axle backs have negligible influence on gains? I guess my real question is how does H pipe, X pipe and aftermarket high flow X pipes w/cats compare in gains and sound without any other exhaust changes? I would prefer to have cats for the environmental aspect if possible to get similar gains than without.
I have the FRPP Sports on mine as well as a FRPP X pipe and high flow cats. I cant compare to an H pipe set up, but the i defintely feel some lower end torque with the X pipe (havent actaully taken it to a dyno though) and the sound is a bit deeper, not much. The whole set up is loud, but not obnoxiously loud unless you stomp on it.

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post #9 of 66 (permalink) Old 01-04-2013
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I know you're not really looking to replace lower exhaust but the magnaflow streets are very mellow cruising (pleasant with window down) but nice when you step on it. No drone at any RPM, and the only set I have identified that had zero rasp or popping, none. I've had them for about a year and love them, and my wife who doesn't like loud cars has no problem with them other than during WOT (which she has a problem with in itself :P)

A quick question. Doesn't the car come with a stock H-pipe, what would be the point of replacing it with another H-pipe? (pardon my ignorance).

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No one that I'm aware of makes a hi-flow catted midpipe for the 3.7's that I'm aware of.

The H will usually give a deeper tone than the X and both will give very similar gains. The 3.7 is never going to have that really deep V8 sound, no matter what you put on it.

The biggest HP gain you will get from exhaust mods are from eliminating the cats. The Lethal O/R H and X pipes will give you around a 14 RWHP gain.

One setup you may want to consider is the GT500 mufflers. They aren't a direct fit, but any muffler shop can make them work.
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post #11 of 66 (permalink) Old 01-04-2013 Thread Starter
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No one that I'm aware of makes a hi-flow catted midpipe for the 3.7's that I'm aware of.

The H will usually give a deeper tone than the X and both will give very similar gains. The 3.7 is never going to have that really deep V8 sound, no matter what you put on it.

The biggest HP gain you will get from exhaust mods are from eliminating the cats. The Lethal O/R H and X pipes will give you around a 14 RWHP gain.

One setup you may want to consider is the GT500 mufflers. They aren't a direct fit, but any muffler shop can make them work.
So, I should just have my cats removed and replaced with pipe for the same ~ 14RWHP gains if I want to leave the H pipe for deeper sound?
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So, I should just have my cats removed and replaced with pipe for the same ~ 14RWHP gains if I want to leave the H pipe for deeper sound?
Lethal Performance sells a direct fit O/R H-pipe that will give you about a 14 RWHP gain.

You could just eliminate the cats with a straight piece of pipe and should get similar gains.
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post #13 of 66 (permalink) Old 01-04-2013 Thread Starter
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Seems like a no brainer to me? I am sure it will be a couple hundred less to do that and I could always weld the cats back in if need be.
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Yea and if you want you can weld in high flow cats to give it an even deeper sound while remaining legal-at least visually- because you'll still have cats in place. I kind of want to do this to mine, but them seeing high flow cats welded in might piss off the dealsrship slightly. My next mod to the exhaust will be some hi flow cats so I can get a good 12 rwhp for about 120 bucks


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Although I do want off road mid pipes, where I live they do emissions and visual testing on exhausts....it'd be a pain to constantly swap out mid pipe and set ups, in my opinion, if your area inspects visually.

To me high flow cats save a bunch a pain at the expense of a few hp. Could always gut the cats too....


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