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StopTech - Drilled Aero-Rotor Kit Front (81.344.9921)

Disc Brake Upgrade Kit



You save: $40.35 (3%) off MSRP


Ships Directly from Manufacturer
Select your vehicle to confirm fitment:

This part fits

  1. 2014 Ford Mustang 5.8L V8 cid:355 cc:5812
  2. 2013 Ford Mustang 5.8L V8 cid:355 cc:5812
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About this product

Part #: 81.344.9921

StopTech AeroRotor Replacement Kits ARK are designed to replace your vehicle's original factory rotors, while retaining the factory brake calipers. Although the ARK is the same diameter and thickness as the factory rotors, it offers improved cooling, braking, and handling. The directional, floating AeroRotors allow independent expansion of the rotor and hat without "coning," thanks to elongated drive pin holes. ARK components include AeroRotor friction rings with patented internal vane design, pre-assembled to billet aluminum AeroHats with directional stand-offs that optimize cooling airflow. The patented AeroRotor vane design pushes up to 80 percent more air than factory rotors for better cooling and reduced fade on the track. The aircraft-grade aluminum hats and 2-piece AeroRotors are up to 8 pounds lighter than stock rotors, allowing faster acceleration and deceleration, and improved handling. StopTech AeroRotors are available slotted or cross-drilled. These slots or holes allow better dissipation of heat, friction material and debris, assuring that fresh pad material is in contact with the rotor every time the brakes are applied. An optional anti-corrosion, zinc finish is available for customers in cold climates, where salt and chemicals are used to melt snow and ice. The zinc coating also benefits customers who prefer no visible surface rust on the vanes and outer circumference of the rotors. StopTech AeroRotors are 100 percent made in the USA.

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See what our community says about stoptech products

What made you choose this particular product?
It was already installed at time of purchase
Is this your first time buying from this brand? Did you consider other brands?
First time using this brand yes, I have considered brembo
View on Luis's build
What made you choose this particular product?
You can find "axle packs" on ebay that include rotors and pads for ~$175, so it's hard to beat that
Is this your first time buying from this brand? Did you consider other brands?
Yeah, first time trying Stoptech. I don't think there are many (or maybe any) other brands that make rotors for the 240
Was it easy to install? Any installation tips that will help others?
Super easy, gotta love 240 brake jobs.
View on Max's build
What made you choose this particular product?
Pretty cheap price for some brakes. Made by StopTech, so I decided to go for it.
Is this your first time buying from this brand? Did you consider other brands?
This is the first time I've bought StopTech products. I was considering Akebono Euro pads, but decided I didn't need those for rear pads.
Once you've had a chance to use the product, did it meet your expectations?
They work just as good, if not better than the previous pads I had installed.
View on Eben's build
What made you choose this particular product?
Stoptech is a trusted brand, and my stock rotors were toast
Is this your first time buying from this brand? Did you consider other brands?
View on Greg's build
Adam Buchanan


Adam Buchanan
2003 Nissan 350Z
What made you choose this particular product?
Best kit available for the Z.
Is this your first time buying from this brand? Did you consider other brands?
View on Adam's build
WARNING: Cancer and Reproductive Harm www.p65warnings.cs.gov

Benefits of adding this mod

How could you possibly enjoy all that tire shredding torque if you can’t stop? A good set of high performance pads, calipers, and rotors are arguably the most important upgrades you can make for a balanced, high performance build. Consistent performance across all operating conditions and reduced stopping distances result in significantly improved track times and a better daily-driver experience. Whatever your goal, we have all the brake parts you’ll need to build your dream ride (and make sure it stops).


we ship worldwide!

Based in California with 3 warehouses across the country, we’re sending out shipments everyday of the week, even Saturdays. Because your next mod shouldn’t have to wait.

+ always free shipping in the U.S.
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Matt Farah

Smoking Tire / The Drive

Thank you for all the help, really. You guys are awesome. This is all great info and I really appreciate everything you have done to help me with my build.

James M.

Ford Focus ST

Your customer service is wonderful. Thank you for taking care of this. My review will express all. Thank you!

Wallace R

Chevrolet Silverado 1500