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Discussion Starter · #1 ·
So I've been reading and researching blah blah blah. What I've come to understand is exhaust drone is the action of the sound frequency harminizing with the metal of the frame of the vehicle causing a reverberation. Which is both heard and felt. Now the fact the 3" inch exhausts clearance from actually touching the vehicles heat shielding is guaranteed it brings me to the conclusion that this by far has to be a major player in what's causing the drone. So take for example the Borla, a 2.5" exhaust, I've read there's no drone but it's loud as hell. Now take the for example the MBRP 3" I read that you get drone. Some say hardly any but either way you spin it the drone is there. So am I correct in my theory that pipe diameter, due to clearance contacting the frame, is a contributor to drone? If I'm right I would ventur to believe that the exhaust hangers in fact also help prevent those vibration from transferring to the frame as well.
 

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Not sure if you are correct but The MBRP does have drone. Especially big turbo

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I don't think pipe diameter is a good predictor of drone. For instance, I had the stock exhaust with the rear muffler removed. Droned like a bi***!! Switched to a Milltek turbo back which is 3", and practically no drone. It all depends on how the exhaust is engineered. Best bet is to just research the brands in my opinion.
 

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I have a catless Borla and no drone
 

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I have the Roush 3 inch cat back, I have not noticed anything that I would call drone.

The exhaust doesn't even really get loud unless I am into boost.
 

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Discussion Starter · #7 ·
I really want to experience in person on someone else's focus what they consider exhaust drone is as this would be my first experience with exhausts as my sexy lady is my first performance car. So anybody live near Charlotte NC?
 

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A properly installed exhaust will never contact the body of the car. The drone has to do with the frequency of the sound. Generally, a larger diameter pipe will have a lower frequency which seems to be more apt to drone in this car.
 

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I just installed a 2.5" Magnaflow exhaust. No drone at all during steady state cruising. When you lay into the throttle it makes a good tone, noticeably more volume than stock but never harsh or droning.
 

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Discussion Starter · #10 ·
So basically 2.5" is a low as you want to go without drone as well as helping the car exhale better?
 

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So basically 2.5" is a low as you want to go without drone as well as helping the car exhale better?
I agree that 2.5" is fine for power on the stock turbo. You can get rid of drone with a 3" system, you just need to choose the proper mufflers and resonators. Mine drones pretty bad, but only at very specific revs/loads where it resonates. Otherwise it's fine and my research involved buying mufflers/resonators on Summit and going to town with my MIG.
 

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So...a 2.5in exhaust will give the most power on stock turbo?

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He is not saying that 3 inch will give less power but that 2.5in exhaust will not limit power on the stock turbo.
 

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He is not saying that 3 inch will give less power but that 2.5in exhaust will not limit power on the stock turbo.
Ok still deciding on which exhaust I want to purchase...I was leaning towards Montune because it's prolly the quietest.

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I was thinking Mountune at first but based on all the video reviews it was just barely above stock. I wanted something a bit more aggressive and the Magnaflow was a good fit for my requirements. 2.5" is fine since I will not upgrade the turbo. I saved a few bucks as well. You can find the Magnaflow on Amazon for about $530. The Mountune will run you nearly $800.
 

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Discussion Starter · #17 ·
Yeah I just saw that too on Amazon. My biggest thing is my car is with me for the next 6 years. It's my daily driver and I may occasionally take a 3 hour trip. So I'm honestly scared of drone, so if you can't take a three hour trip with your exhaust let it be know so I may know as well as many others.
 

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Yeah I just saw that too on Amazon. My biggest thing is my car is with me for the next 6 years. It's my daily driver and I may occasionally take a 3 hour trip. So I'm honestly scared of drone, so if you can't take a three hour trip with your exhaust let it be know so I may know as well as many others.
I drive 2-3 hrs per day with the borla and depo dp. Love it! ( It is wake the dead loud at WOT though )

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I drive 2-3 hrs per day with the borla and depo dp. Love it! ( It is wake the dead loud at WOT though )

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Yours isn't as loud as mine lol catless ftw!!! But no drone for me. I drive around 4 hours for car meets and have friends and such ride in my car and absolutely no complaints this is including 3 motor mounts to
 

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Yeah I just saw that too on Amazon. My biggest thing is my car is with me for the next 6 years. It's my daily driver and I may occasionally take a 3 hour trip. So I'm honestly scared of drone, so if you can't take a three hour trip with your exhaust let it be know so I may know as well as many others.
As long as it doesn't drone at your cruising revs, you should be fine.
 
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