Hello Guys,

I've just barely started the mod process on my 14 GT. Sadly, the only exhaust I've heard in person was a Roush axle back on a 13 V6 automatic. Too raspy for my taste.
And I heard the roush exhaust from a roush mustang at the dealership.

My question is, who is running exhaust cutouts? I've seen a few members here running them on late model mustangs and I thought it might be worth a shot.

The exhaust choices I'm looking at are either:

1) Borla S-Type axle back OR cat back. (Still trying to learn about the benefits/sound/cost differences)
2) GT500 axle backs WITH a Boss side exit exhaust, with electronic cutouts for stealthy times late at night.

Option 2 is loud when I want it, and quiet when I want it. But costly. And most people would argue that option 1 is quiet when you're off the pedal and loud when your on it.

So I assume it boils down to cost? I live in Canada, so 100% chance I'll be ordering everything from the states (added shipping costs) and getting an exhaust shop to do the install (I don't have a lift or ramps).

The most popular opinion here will win. I'll be extremely happy with either choice. I'm
Just looking for someone with wisdom and experience to tell me what route to go.

Unless you guys see a better option? Maybe Borla s-type axle backs with the boss side exhaust and the cutouts?

The car will just be street driven. Quiet in the neighbourhood and loud on the Main Street.


Thanks again for answering the most repeated question in mustang history!

Regards,
Joe

 

Bump?

 

You have asked for opinions so here is mine... There is a difference to me in "Loud Good" and "Loud Obnoxious". Cut outs more often than not are Loud Obnoxious... On a rare occasion you will find a true Muscle Car that cut outs sound good on... And it is usually just at idle. Then it becomes Loud Obnoxious. Most modern vehicles do not have big enough cams to sound nice with open exhaust... IMO

 

Fair enough. Good opinion and I respect that.

I think most people (including the ford guy at the dealership) say to go with the Borla for ease of installation.
I thought the GT500's with the cutouts going to the boss side exit exhaust would offer the best of both worlds,but it just seems like it would be needlessly complicated.

 

I have the GT500s installed on my '14, and am planning on adding the Boss quad set-up. I have seen several reviews from people who have this set-up, and they have all been very positive.

I wasn't planning on going with cut-outs. The Boss exhaust comes with restrictor plates that can be drilled out to get just the sound you want. Several people indicate they have removed the plates entirely, and the result is not too loud. I've heard a Boss in person, and- while the exhaust is definitely noticeable (nothing subtle about it), it is by no means obnoxious. At idle it is definitely quieter than your typical Harley idling...

 

I went GT500 AB with the Boss quad setup w/electric cutouts, I really like this setup. I put the cutouts on since I leave for work very early and I close them before starting it in the morning while it is idling in the garage.

During the weekend, I leave them open all the time. But I been looking at the Borla S-Type also, they sound great by them selves and I may go with the quad tips one of these days.

 

This is exactly what I want to do. Quiet in the mornings and loud all weekend.

A guy could always sell the GT500's down the road, and add the Borla axle back to the quad setup as well.

 

MoeJoe,
Consider the Boss302 quad exhaust. It will likely be cheaper, has a really superb/natural exhaust tone, can be tuned with the restrictor plates to be relatively quiet or reasonably loud (when wide open)...surprisingly tame when you're not standing on the gas pedal.

Elecric cut-outs seem like a great idea but they live pretty short lives before they fail (based on the experiences of folks I know).

 

MRGTX, I am considering the boss exhaust.
I know it's a true quad exhaust setup, and I know about the restrictor plates. What I had planned, was to add the electronic cutout switch in place where the pipe "Y" bends.

The end result that I wanted was when the switch is closed I just have the GT500 axle backs.
When I open the switch, then it flows to both the GT500 axle backs AND the boss side exit pipes.
Not sure if I wanted those things running ALL the time. Knowing me, I'd take those restrictor plates out and chuck em!

Thanks again for the heads up on the cutouts. It's probably a lot simpler to just run the GT500 axle back with the boss side exhaust, no plates and no fooling around with cutouts and switches.

 

Ehh stick to normal exhaust mods, sounding like a top fuel dragster in your 12 second car is a bit ricer IMO.

 

Please see my sig and my many many many many many many (is that enough many's?) posts (and videos) about my progression from stock to gt500 abs to borla s abs to borla s catback.

The latter has been where I'm at the last 2 yrs. no substitute.

Borla ftw.

 

I've been following your posts quite regularly.
I am tempted to get the Borla S type axle back, or even the catback. Just trying to price out shipping for all of these things to canada.

 

Np sir. The borla s catbacks are in a league of their own. If you only could see or hear all the comments I get about the sound the car makes. In 2 yrs, every person who's said something to me about had nothing but positives.

I'm searching through some old threads for you... And here's a quote from Anthony

 

And here's my old thread about it

https://themustangsource.com/f800/bo...-5-0-a-519989/

 

The Borlas do sound superb, but- for the money- the GT500s can't be beat.

As for the Boss quads being ricer... considering they come stock on the Boss 302, I think they are- by definition- not ricer (but everyone has an opinion). I've heard the restricted Boss 302 quads in person, and... wow. They are actually quite civilized when you're not wide open- but give it some gas and yeah, they sound sweet. They are perhaps at their best when downshifting (and they sound nothing like the fart cans on souped up Hondas). IIRC, they spent quite a bit of time getting the sound on the quads jusssst right.

 

I'm not worried about being ricer or anything.
I'm pretty sure any of those exhausts will sound fantastic. I have seen a set of boss side exhaust pipes for sale.
Just trying to decide between the Borla S type catback/axle back, or the GT500's.

So far the GT500's with the Boss Side Exhaust are winning. Maybe it's due to the cost? Maybe it's due to the ability to tune the sound with/without the restrictor plates.

 

Most aftermarket exhaust systems are all going to stainless. They last a little longer. I've never had a welded aluminum muffler rot out so I really don't get the hype. A lot of the high pitch raspiness you hear is due to the stainless steel mufflers and the placement of the mufflers on the newer cars. Mac or Flowmaster with the welded aluminum mufflers should tone that down. I wouldn't go with more than a two chamber Flowmaster because they just don't sound as good. Personally I hate the way the new mustangs sound especially with aftermarket exhausts. I've only seen one guy here go a different route with mufflers before the axle but I think he may have taken a couple wrong turns on his setup. Do something different and unique is my recommendation. I an running Bassani with a x-pipe and I can't stand it.

 

When it comes to cost, the Borla's will be around the same by the time you get the Boss H and the GT500 AB. Then if you throw on the electric cutouts you are adding another 200-300.00 on that.

I agree with the others, the S-Type sound and look great and I am tempted all the time to sell my current setup and go Borla.

You will be happy either way you go, I love the sound when the quads are open.

 

I have the Boss quad with electric cut outs. They fit exactly where the boss restrictor plates fit. I can dial in the sound I want. Down shifts make an nice interesting sound. My granddaughter said "granddad your car sounds angry!" So far no problem with the electric cut outs. It is nice to dial back the sound on long road trips.


Do a search on you tube for QTP / boss cut outs for install look and sounds

 

I've looked at some videos about QTP cutouts and I wasn't exactly sure where the cutouts would fit on the pipe. I thought maybe it could set it up so that when the cutouts are closed the exhaust flows ONLY through the axle backs.
When they're opened up the exhaust gases flow through the axle back AND the boss side exit as well. Which I would run with NO restrictor plates.

With this set-up I can run cutouts closed on cold start ups and early mornings.
Then on the road, I open the cutouts and it's 4 pipes flowing.

Is this possible, or just a pipe dream? Pun intended