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Old 05-21-2016, 05:43 PM   #1
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Good flowing not so loud exhaust?

Im looking to help my muskrat exhale a little easier. My cats are rattling so I was looking into a catless H pipe, X pipes may be better for performance but I like the way the H pipe sounds better.

My issues are finding a decently quiet aftermarket exhaust from the H-pipe back. I have been looking at the SR Performance catback on american muscle. Judging by the reviews, most people are complaining the exhaust system isnt loud enough, which would be what I am looking for. The SR Performance exhaust looks closest to the mustang stock setup.

Would a Catless H and SR cat back be obnoxious? Im looking for stock 05-06 GTO loud, not open dump pipes loud.
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Old 05-21-2016, 05:46 PM   #2
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Ummmmm.............if you go catless, what are you going to do about this:

Massachusetts Smog Check and Car Inspection | DMV.org
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Old 05-21-2016, 06:24 PM   #3
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Ummmmm.............if you go catless, what are you going to do about this:

Massachusetts Smog Check and Car Inspection | DMV.org


uhm....pass state inspection? The question wasnt "will I be able to pass smog" or "how can I pass smog without cats" the question was about exhaust volume and sound.

Thanks.
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Old 05-21-2016, 07:55 PM   #4
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uhm....pass state inspection? The question wasnt "will I be able to pass smog" or "how can I pass smog without cats" the question was about exhaust volume and sound.

Thanks.
Yeah............good luck with that.
Sorry to have offered an opinion as to the viability of what you are planning.
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Old 05-21-2016, 08:20 PM   #5
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Yeah............good luck with that.
Sorry to have offered an opinion as to the viability of what you are planning.
None of my vehicles have cats. 0. All of them have valid inspection stickers on them. I do not understand how a non-problem could hijack a thread.
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Old 05-21-2016, 08:23 PM   #6
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Seeing as how you are being overwhelmed with opinions as to what exhaust you should get (like THAT has never been asked here before)..............I'll not post again..............you're welcome.
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Old 05-21-2016, 09:25 PM   #7
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The SR is on the quiter side, or get Flowmaster 3 chambered mufflers and pair them with the off road h pipe. Be cheaper too unless youre dead set on a cat back set up. Just have them welded in. It would be quiter.

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Old 05-21-2016, 09:26 PM   #8
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Im not sure if Flowmaster sells a catback with the 3 chambered mufflers?

Always go with Dynomax Ultra Flows too. Arent real loud until WOT.

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Old 05-22-2016, 12:12 AM   #9
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Originally Posted by mickyads92 View Post
Im looking to help my muskrat exhale a little easier. My cats are rattling so I was looking into a catless H pipe, X pipes may be better for performance but I like the way the H pipe sounds better.

My issues are finding a decently quiet aftermarket exhaust from the H-pipe back. I have been looking at the SR Performance catback on american muscle. Judging by the reviews, most people are complaining the exhaust system isnt loud enough, which would be what I am looking for. The SR Performance exhaust looks closest to the mustang stock setup.

Would a Catless H and SR cat back be obnoxious? Im looking for stock 05-06 GTO loud, not open dump pipes loud.
Why not just start out catless with the stock catback and see how it sounds?
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Old 05-22-2016, 02:41 AM   #10
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Im not sure if Flowmaster sells a catback with the 3 chambered mufflers?

Always go with Dynomax Ultra Flows too. Arent real loud until WOT.

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The flowmaster 2 chambers on stock setup are quiet enough so I assume 3 chamber tone would be almost like stock lol.

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Old 05-22-2016, 03:01 PM   #11
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Here you go and cheap and free shipping and way better quality than SR crap.

http://www.summitracing.com/parts/wl.../model/mustang

I ran this catback myself, its mild at idle and low RPM but you know its aftermarket, it does not drone on the highway either. When you punch it and get into the upper RPM band it SCREAMS though. I had shorty headers and an offroad H pipe as well.

As far as X vs H... power is the same, run whichever one you prefer as far as sound. These mufflers are straight through so the X will work on them without being too raspy.
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Old 05-23-2016, 11:23 AM   #12
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I have bbk headers, no cats, full magnaflow system behind a crossover box (can't remember the name). With the top down, sounds really good at all rpm. With the top up, it's droooooooooooooooooone city around 2k rpm.
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Old 05-24-2016, 04:02 AM   #13
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I m going with the mac pro chamber on sale now! At AM

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Old 05-24-2016, 10:32 AM   #14
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I m going with the mac pro chamber on sale now! At AM

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If you really want to pay over $100 more than the UPR X pipe then go ahead... The UPR unit is $159 and there is a 5% public discount code for them to take care of a chunk of the shipping cost.
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Old 05-24-2016, 01:50 PM   #15
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I m going with the mac pro chamber on sale now! At AM

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Very good choice! I'm getting ready to order another one, I absolutely love the sound, especially on a 2v.

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Old 05-24-2016, 02:11 PM   #16
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Very good choice! I'm getting ready to order another one, I absolutely love the sound, especially on a 2v.

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Are you going to be selling your H pipe? You have a Pypes off road H if I remember right?

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Old 05-24-2016, 02:32 PM   #17
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If you really want to pay over $100 more than the UPR X pipe then go ahead... The UPR unit is $159 and there is a 5% public discount code for them to take care of a chunk of the shipping cost.
I wanted an h pipe sound, I was gonna order the cattex upr x pipe but it came out to $326 with shipping all the way here in california. I actually have a 10% discount for upr.

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Old 05-24-2016, 02:34 PM   #18
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Very good choice! I'm getting ready to order another one, I absolutely love the sound, especially on a 2v.

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I m gonna try to install it myself using ramps, I ll post some pics when I get started on it.

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Old 05-24-2016, 10:51 PM   #19
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Are you going to be selling your H pipe? You have a Pypes off road H if I remember right?

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The Pypes o/r H will go on my wife's Mustang.

"Insert clever phase here"

---------- Post added at 11:51 PM ---------- Previous post was at 11:50 PM ----------

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I m gonna try to install it myself using ramps, I ll post some pics when I get started on it.

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It's not too bad with ramps and decent tools.

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Old 05-25-2016, 12:44 AM   #20
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The Pypes o/r H will go on my wife's Mustang.

"Insert clever phase here"

---------- Post added at 11:51 PM ---------- Previous post was at 11:50 PM ----------



It's not too bad with ramps and decent tools.

"Insert clever phase here"
That sounds like a good plan then, lol. How do they sound on a V6?

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Old 05-25-2016, 12:31 PM   #21
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TBTH if you can't do a mid pipe change in your driveway you should just leave it all stock and drive it. Or buy a Fusion.
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Old 05-25-2016, 03:05 PM   #22
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TBTH if you can't do a mid pipe change in your driveway you should just leave it all stock and drive it. Or buy a Fusion.
I somewhat agree. It also depends on if you have the right tools, ramps, jack, jack stands, safe place to do it, garage, weather, time (my issue usually), etc. I personally wont F with it and will take it to my local Muffler Man shop Ive been using for years, and have them slap it on while I sit in the AC, sip on complimentary coffee, and look Sports Illustrated for $60- $75. I know it sounds like a waste of money but by the time I soak the bolts with PB Blaster, get it on ramps or stands, get the tools out and ready, set up lights cause my garage sucks with lighting, driveway is too steep for my comfort on a jack and stands, I can just spend an 1hr worth of labor or so and be done with it, no leaks, and ready to go. Haha

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Old 05-26-2016, 07:09 AM   #23
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Eh yeah I have enough tools, ramps, a driveway that doesn't suck, a garage and lift access if I need it. But I can totally understand that logic as well. Sometimes you just don't feel like messing with it.
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Old 05-26-2016, 03:15 PM   #24
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I've got a nice long flat driveway and all the tools I need, but I don't have a lot of time. I end up having some work done just to fit it into my schedule. But there are definitely some things that shops just charge too much for, for those I make the time.

"Insert clever phase here"
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Old 05-26-2016, 03:26 PM   #25
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None of my vehicles have cats. 0. All of them have valid inspection stickers on them. I do not understand how a non-problem could hijack a thread.
OP, have you considered just removing the cats, keeping the rest of the factory tubing and going with a good set of mufflers. You can get the sound you want without being too loud. I am running an off road H, with the SLP catback, except I had the loudmouth 1's swapped out with Flowmaster Original 40's. Not too loud unless I get into the throttle. Here's a short clip to give you an idea. The same thing can be accomplished for much less money than I wasted by just swapping out the stock 500lb mufflers for a set of your liking and removing the cats. Hope this helps.

https://youtu.be/K9JgmNBkPVo

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Old 05-26-2016, 06:11 PM   #26
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I've got a nice long flat driveway and all the tools I need, but I don't have a lot of time. I end up having some work done just to fit it into my schedule. But there are definitely some things that shops just charge too much for, for those I make the time.

"Insert clever phase here"
Wow project pony that s a very nice house!

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