Shelby (by Borla) GT500 Cat-back Exhaust installed (+ video sound clip)

[Jmeo]

I just wanted to share this new Shelby (by Borla) cat-back exhaust that has been released for all 2020-2022 Shelby GT500 Mustangs. When I sent my car to Shelby American in 2020, I spoke to their VP Vince Laviolette about them possibly having an exhaust. I was told yes, they are in the works with Borla to make a Shelby branded kit. Well, almost three years later it has arrived.

To my knowledge this kit combines the Atak mufflers with a mid-muffler (resonator) to quiet the extremely loud Atack mufflers, and make it more stock like, just deeper. They did not disappoint, this kit is b-e-a-utiful. The entire kit is 3" except for the neck dow to 2.75" (I believe) to attach to the stock connect. The mid muffler-resonator is of straight through design which I believe also has an (H) internally. All the mufflers are SHELBY branded, and so are the tips.

I was worried the the tips were going to disappoint in size compared to stock, but nope, that are equally massive. I for one especially love the SHELBY branding on them as well.

Unfortunately I will not get this system installed for sometime. Life is too busy with work and college, and well, it's winter.

Here is the link: https://www.shelbystore.com/2020-Borla-Exhaust-p/130810.htm

Here are the specifics from the Shelby American website if anyone is interested in the full description.

Here are some actual photos from my kit, hot off the Fedex truck.

UPDATE:


As you all could probably imagine, I could not take the suspense. Today being a clear day I figured what the hell and skipped college for a few hours. Total install time including the time to take the car off my 4 post lift and put it on the 2 post lift, weigh everything, install everything and test drive it, all by my lonesome, was 3.5 hours.

Stock cold start reference video:



Stock exhaust weighed in at 79.2 lbs (scale was zeroed with 2x4 in place)

New right side muffler with all hardware and exhaust module installed weighed in at 17.6 lbs

New left side muffler with all hardware and exhaust module installed weighed in at 17.4 lbs

Mid muffler with all hardware installed came in at 15.6 lbs

New right & left connection pipes combined weighed in at 17.6 lbs

Stock = (79.2) - combined weight of new exhaust (68.2) = 11 lbs lighter than the stock system

Here is the both system compared. It may not be noticeable in the photos but the piping is larger than stock, especially where the mufflers exit to the tail pipes (they also exit straight). The tips are larger than stock, and the openings are larger than stock.

And installed

Post installation cold start video:



I took it for a drive and all exhaust modes work as they should. Without a doubt deeper than stock, which is what I wanted. I do not think it's louder than stock, just much deeper. I think this may be the answer for track guys who are getting hit for exceeding their track DB levels.

Post test drive burble. Definitely deeper:

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[WD Pro]

Looks very nice

The mid muffler-resonator is of straight through design which I believe also has an (H) internally.

Viewed from a slightly different angle, if it has a crossover pipe you should be able to see it

WD

 

[Jmeo]

Looks very nice



Viewed from a slightly different angle, if it has a crossover pipe you should be able to see it

WD

Yup. Thing is I took the pictures before I left home. I know with certainty the mid muffler that was part of my Borla Touring kit on my last two cars did indeed have the H crossover, so I can only assume this one does too, I just failed to check when I was huffily taking the pictures. Tomorrow is another day.

 

[Evolvd]

Man I’m really wanting to hear this one! Someone install it and take video so I can throw more money at my car! Lol

 

[DopamineQuest]

Have a link to the product page? Wanna take a look

 

[Hadelson]

This looks virtually identical to the Borla European AE Catback system I installed on my Roush RS3. Borla makes quality products. Deep tone and rumble - no drone - WOT you here it

 

[Jmeo]

Have a link to the product page? Wanna take a look

I also added to the first post. I meant to originally but obviously forgot, sorry about that.

https://www.shelbystore.com/2020-Borla-Exhaust-p/130810.htm

 

[Jmeo]

This looks virtually identical to the Borla European AE Catback system I installed on my Roush RS3. Borla makes quality products. Deep tone and rumble - no drone - WOT you here it

Yeah it also looks like my Borla Touring kit I had on my 2015 & 2017 Mustang GT. That said, the 3” diameter brings it to a whole new level. These pictures really do not do justice to the girth of these pipes. Largest diameter exhaust I have owned for sure.

 

[Epiphany]

Love the shots you took as well as the hardware. Very nice Jaime.

 

[SubSolar]

Can't wait for videos to hear it. Wonder what the decibels are compared to stock and ATAK?

 

[kilobravo]

OVER THE TOP, Jaime! That rig looks amazing and I too am anxious to hear it, even via video but roger on Winter. I bet you'll be out there in the cold garage soon though. :-) FTR, the forecast high for today here is 90. :-)

 

[WD Pro]

Can't wait for videos to hear it.

Same here Although video clips rarely seem to do these kind of things any justice ...

Wonder what the decibels are compared to stock and ATAK?

I will take a guess that in track it will be a little louder than the stock 500 system (tubing diameter increase) but much deeper with less of the high tones.

My logic :

• Suitcase = same basic design (straight through) and similar sized, but with a longer length of perforations (reducing high tones & rasp) and the H (adding some rumble).
• Mufflers = same basic design (straight through when the valves are open) and similar sized.
• Additional bullet resonators (further reducing high tones & rasp).

I suspect the most noticeable differences will be in the drive modes where the valves are more active forcing more of the gas though the muffler / outer tailpipes. Fords standard design (if similar to the GT AE) is reasonably restrictive and has quite a tortuous gas path when it's forcing gas through the outer pipes. Borla would have a lot of flexibility to mess around with the internal configuration and sound for the outer pipes.

I would be interested to see how my armchair analysis pans out in reality Even if I'm miles off ...

WD

 

[Epiphany]

How much does that resonator weigh?

 

[Jmeo]

As you all could probably imagine, I could not take the suspense. Today being a clear day I figured what the hell and skipped college for a few hours. Total install time including the time to take the car off my 4 post lift and put it on the 2 post lift, weigh everything, install everything and test drive it, all by my lonesome, was 3.5 hours.

Stock cold start reference video:



Stock exhaust weighed in at 79.2 lbs (scale was zeroed with 2x4 in place)

New right side muffler with all hardware and exhaust module installed weighed in at 17.6 lbs

New left side muffler with all hardware and exhaust module installed weighed in at 17.4 lbs

Mid muffler with all hardware installed came in at 15.6 lbs

New right & left connection pipes combined weighed in at 17.6 lbs

Stock = (79.2) - combined weight of new exhaust (68.2) = 11 lbs lighter than the stock system

Here is the both system compared. It may not be noticeable in the photos but the piping is larger than stock, especially where the mufflers exit to the tail pipes (they also exit straight). The tips are larger than stock, and the openings are larger than stock.

And installed

Post installation cold start video:



I took it for a drive and all exhaust modes work as they should. Without a doubt deeper than stock, which is what I wanted. I do not think it's louder than stock, just much deeper. I think this may be the answer for track guys who are getting hit for exceeding their track DB levels.

Post test drive burble. Definitely deeper:

 

[Ezatnova]

As you all could probably imagine, I could not take the suspense. Today being a clear day I figured what the hell and skipped college for a few hours. Total install time including the time to take the car off my 4 post lift and put it on the 2 post lift, weigh everything, install everything and test drive it, all by my lonesome, was 3.5 hours.

Woah! This is amazing! Congratulations and THANK YOU @Jmeo for the awesome write up and pics.

You and I chatted a bit over PM before (I bought a Lethal H and it's still in my garage, was planning on a spring install), and I believe you had and then removed that H, due to not caring for it.

Some questions if you don't mind (figured I'd ask here to benefit others, hopefully)

- How as the install overall as far as fit & finish, fitting/rubbing anywhere, clamps sealing well, etc.? I know some aftermarket clamps, i.e. the Lethal ones they ship, aren't great and the better ones on Amazon are recommended.

- This is bolt-on, correct? Nothing needs to be cut?

- Since I believe you had the Lethal H, you're in a rare spot to be able to comment on stock->H->Shelby Borla. Can you compare between the H and this, please?

- I think this really sounds like exactly what I'm interested in. I only have 150 miles on my car but the rasp sort of bugs me each time. The startup buzz, and then partial throttle in Normal and Sport has sort of a "swirling marble around in a coffee can" rasp sound that I don't care for, and it only goes away in Track mode. Sounds like this system that makes it deeper but not crazy loud could be the ticket for a more traditional v8 muscle car sound?

- I see they say "no drone" but have you had it on the highway in Track yet? The stock system drones in Track mode for me when on a highway at 60-80 mph.

Thanks again. This is fantastic.

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