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2013 GT500 candy red white stripes
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I recently bought my first Shelby 2013 gt500 with 4k miles and couldn't help but notice the annoying drone around 75mph. I thought this car was stock but now second guessing because I also found a sct tuner with a headers CEL tune.
I know my father's 2022 Shelby has no drone at all.
Is this normal for a stock 2013 gt500?
 

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I recently bought my first Shelby 2013 gt500 with 4k miles and couldn't help but notice the annoying drone around 75mph. I thought this car was stock but now second guessing because I also found a sct tuner with a headers CEL tune.
I know my father's 2022 Shelby has no drone at all.
Is this normal for a stock 2013 gt500?
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2014 Shelby GT500 2013 F150 SVT Raptor
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1,750 Posts
@ihaterice hit the nail on the head. First step is to determine what’s been done to the exhaust. Mine is stock back to the axle backs. Ford Performance Sport(Borla) axle backs on mine and no drone at any speed.
 
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· Moderator/Admin Dude!
2020 CFTP Red! 2011 Kona Blue
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I recently bought my first Shelby 2013 gt500 with 4k miles and couldn't help but notice the annoying drone around 75mph. I thought this car was stock but now second guessing because I also found a sct tuner with a headers CEL tune.
I know my father's 2022 Shelby has no drone at all.
Is this normal for a stock 2013 gt500?
Welcome! Post some pics. No nudes.
 

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2018 GT350
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If it bothers you bad enough you could always design a custom Helmholtz resonator setup for the car. I had this issue with an annoying drone around 1600-1900 rpm in my Lexus so used an online calculator and had a local shop build these for me on each rear pipe. Worked great and the drone is now completely gone. You can play with the internal diameters and lengths of the tube feeding the chamber and the chamber itself to find something that fits in the available space you have. Very common to see these on many modern high end exhaust systems now. Attached are the calculations I used to solve my problem, but your frequencies will probably be different than mine.


 

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2013 GT500
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265 Posts
Take a peek under the back bumper and see what mufflers are on it. Shouldn’t have too much drone from just an Axleback even though
 

· Moderator/Admin Dude!
2020 CFTP Red! 2011 Kona Blue
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Take a peek under the back bumper and see what mufflers are on it. Shouldn’t have too much drone from just an Axleback even though
Super Snake oval mufflers drone badly!
 
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· #1 Mike!
2019 Shelby GT350
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I recently bought my first Shelby 2013 gt500 with 4k miles and couldn't help but notice the annoying drone around 75mph. I thought this car was stock but now second guessing because I also found a sct tuner with a headers CEL tune.
I know my father's 2022 Shelby has no drone at all.
Is this normal for a stock 2013 gt500?
I had a 2013 GT500 for six years. It had stock exhaust. No drone, whatsoever. Someone modified your exhaust.
 

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2014 Shelby GT500, SGM, " 1 of 1 "
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Welcome! Post some pics. No nudes.
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2013 GT500 candy red white stripes
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I recently bought my first Shelby 2013 gt500 with 4k miles and couldn't help but notice the annoying drone around 75mph. I thought this car was stock but now second guessing because I also found a sct tuner with a headers CEL tune.
I know my father's 2022 Shelby has no drone at all.
Is this normal for a stock 2013 gt500?
This is the only pic I have of the back of the car right now I have looked underneath and the whole exhaust is all the same copperish color like OEM with O2 sensors still attached no extensions of any kind. I will get pictures of underneath sometime this week.
Wheel Tire Vehicle Car Sky
 

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2013 GT500 candy red white stripes
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Discussion Starter · #15 ·
I recently bought my first Shelby 2013 gt500 with 4k miles and couldn't help but notice the annoying drone around 75mph. I thought this car was stock but now second guessing because I also found a sct tuner with a headers CEL tune.
I know my father's 2022 Shelby has no drone at all.
Is this normal for a stock 2013 gt500?
Welcome! Post some pics. No nudes.
Tire Wheel Vehicle Car Grille

Car Vehicle Grille Hood Automotive lighting

Wheel Tire Vehicle Car Motor vehicle

Wheel Tire Vehicle Car Sky

Motor vehicle Vehicle Car Automotive design Automotive tire
 

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2008 GT500
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Welcome to the site!
That is one sexy GT500. My god, those wheels are just beautiful! What are those wheels?
 

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2014 Shelby GT500 2013 F150 SVT Raptor
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Hard to tell from the pic but the edges on those tips look too rounded to be the stock ones. Stock tips are just straight cut at an angle that matches the angle of the opening.
 
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