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DBA 4000 XS Sport Cross-Drilled & Slotted Rotor - Rear (15-18 GT; EcoBoost w/ Performance Pack)

AmericanMuscle no longer carries the DBA 4000 XS Sport Cross-Drilled & Slotted Rotor - Rear (15-18 GT; EcoBoost w/ Performance Pack). Please check out 2015-2019 Mustang Rotors for an updated selection.
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Features, Video & Details

  • Improves Braking Power; Increases Initial Bite
  • Designed for Serious Street Performance
  • Cross-Drilled and Slotted Design
  • Dissipates Gasses, Water and Debris From Rotor Face
  • Kangaroo Paw Ventilated Design Improves Heat Dissipation
  • Specially Formulated XG-150 Cast Iron Construction
  • Thermo-Graphic Temperature Monitoring
  • Non-Directional Design
  • (1) Rear Rotor - Sold Individually
  • Fits 2015-2018 EcoBoost with 4-Piston Performance Package
  • Fits 2015-2018 GT with Standard 4-Piston Calipers

Review & Installation Video

Review & Install Video

Hey, guys, Stephanie with here with a cross-drilled and slotted front rotor option from DBA for 2015 and up performance pack equipped EcoBoosts and non-performance pack GT Mustangs. These particular DBA rotors are going to be a go-to option for those of you out there that are looking for the most performance based rotor that you can currently grab. These are from the 4000 Series which falls under DBA's Heavy Duty line, the next line after the Street Series. They're designed for appearance and braking performance. To be specific, these are the 4000 XS Sport Rotors which are a step up from the T3s which also are a 4000 Series rotor from DBA, so they're going to have some extra features that'll help them perform better and make them an overall more aggressive rotor. So the fitment of brakes for the S550 is not as straightforward as it has been in the past with some of the older Mustangs due to the performance pack upgrade, so it's something that you need to pay attention to. Non-performance pack GTs and performance pack EcoBoosts share the same setup with a four piston caliper, so these rotors are going to be for those cars. There are always going to be a few things to consider when you're shopping for any type of upgraded braking components just so you can make sure they're gonna be right for you and perform as you expect them to. You need to determine the level of performance that you want out of the brakes, what you'll be doing with your car - track, drag strip, or just a street car, your wheel setup, you wanna make sure that the brakes will fit behind your wheels, and some smaller things like knowing your rotors in order to choose the correct pad composition. And of course, your budget's gonna play a big role in this. As far as rotors go, bigger does tend to be better. Braking performance depends on surface area. By this I mean how much surface area the brake pads have to bite into. Larger discs and larger pads have more surface area and therefore allow for shorter, faster stops simply because of the bite that the brakes will have. On top of that, increased surface area means better heat dispersal. And with braking, you want as little heat as possible if you want highly effective stopping power. These are gonna be direct fit replacement rotors that have a handful of specific features that are gonna help them outperform the other rotor options that are currently available. First of all, these are cross-drilled and slotted. They have what DBA calls kangaroo paw ventilation. They're thermographic temperature monitoring capabilities and especially formulated XG-150 cast iron construction. That's a lot of random technical terms, so I'm gonna explain what it all means for you. So let's start with these being slotted. The slotted portion of the rotor is the grooves that are cut along the face here where the pad makes contact. When there's repeated heavy braking, a layer of gas and dust forms from the materials transfer that's caused by the friction here. And the slots give places for the gases to escape to. This means more contact surface area for the brake pad, which we all know is a good thing. So by creating more contact surface, the slots work to fight against brake fade. And these rotors are also cross-drilled. The thought behind drilling a rotor is that it offers a way to cool the rotor. Much like slotting a rotor, the drilling gives the gases a place to escape to. With all of the advances and improvements in brake systems today, drilled rotors offer more of a cool appearance than anything else. They do help with some cooling and they will reduce pad glaze with the help of the slotting, but I will say that a drilled rotor does tend to be more eye catching. Either way, like I mentioned earlier, these were designed with both appearance and performance in mind. So DBA double covers you here with both a slotted and cross-drilled rotor. And then we have this kangaroo paw ventilation. Your ventilation system isn't going to be visible to you. It's going to be down here in the middle of the rotor and the cross-section. I will admit this kind of has a silly name, but hear me out on this. It's actually some neat technology that's gonna help keep the braking system as cool as possible. So, basically, if we cut away at the surface here in the cross-section, you'd normally see straight veins for cooling, so just some vertical step ups in the casting that are spaced pretty far apart that direct the warm air outwards and away from the rotor. These rotors are not like that. Instead of having these conventional straight veins, there are a bunch of diamond and tear drop shaped pillars that are placed so that the rotor is not only stronger, but it also gives a much more efficient cooling method, efficient in the sense of faster cooling. And faster cooling means returning to optimal operating temps and getting the rotor ready for the next braking application faster. And a little side note: the name kangaroo paw is a head nod to the Australian native plant, not the actual animal, since DBA is out of Australia. And yeah, I did Google that. Anyways, DBA is saying that this type of cooling system is actually 20% more efficient than the conventional system. And I mentioned that it adds strength to the rotor. This is because it gives more support to the friction base. So instead of having small gapped veins with a lot of space in between them, there are a bunch of pillars that are spread across the disc face giving more surface area and more stable and consistent operation. Next is the thermographic temperature monitoring. DBA puts thermographic paint markings on the outer edge of each rotor. And it's designed to measure the actual bulk temperature of the disc when it's operating at the most extreme condition. By reading these measurements you can figure out how well your current system is functioning or if you need to make changes such as a different brake pad compound. This could be a highly useful tool if you're considering really utilizing these rotors for performance application, and it's a nice feature that you aren't going to get anywhere else. The last thing we'll discuss is the cast iron construction. Specifically speaking, these rotors are made from a high carbon alloy iron that gives them great thermal capacity and strength. It has a great heat capacity due to the fact that it's actually formulated for heat absorption and fast dissipation. What's neat to me about these rotors is that DBA has actually developed a lot of these technologies themselves from the kangaroo technology to this particular cast iron formulation. So these are characteristics that you're only going to get from DBA brakes. Since we're talking rotor materials here, we also need to address brake pads. When you're looking to upgrade brakes, the brake pads themselves are an important piece to the puzzle. They're a component that's gonna be directly in contact with the friction surface, so you wanna make sure that you're getting the right pads for your application and for your rotor material. Like I just mentioned, these are cast iron rotors, so you wanna make sure that you're shopping for pads that are designed to work with that material. If you don't, you're not gonna be getting the best performance possible or as long of a life out of your components. As far as price, you're looking at spending about $200 per rotor since these rotors are sold individually and not in sets. These are a non-directional rotor as well. And there are some other options on the site if these aren't quite what you're looking for. DBA offers a step down from these here, and Baer offers a set of rotors as well. When it comes to the install, you're really not looking at anything difficult. You can expect about two hours to finish the install on both sides and a one out of three wrenches on the difficulty meter. You're obviously gonna need to get the car off the ground and pull the wheels off and remove the calipers. They come off with two bolts, and the caliper slides off so you can set it aside and out of the way. The caliper bracket also needs to come off so you're left with just the rotors, and then those can slide right off. The new rotors can go into place, then you just need to reassemble the calipers and put them back into place. Now is a good time to upgrade your pads while you're doing your rotors, but that's all going to be up to you. That's pretty much all you're looking at install wise, but don't forget about the break-in period with the new brakes. You wanna make sure that they're safe and have a long life. Overall, there really is a lot going on with these 4000 XS sport rotors from DBA. They're drilled and slotted. They have a new ventilation design and a special cast iron construction along with thermographic temperature monitoring. And the big picture, they're a highly performance based rotor that's also designed to look good while functioning. And it's hard for me to deny that these do look good behind a nice set of wheels. As always, check these out more online for yourself and do some research of your own. And for all things Mustang, keep it right here at

Exceptional Braking Performance. DBA designed and engineered their DBA 4000 XS Sport Rotors with the serious street driver in mind. DBA Rotors will provide exceptional braking performance in the turns and on the straightaways. DBA 4000 XS Rotors feature a cross-drilled & slotted design that quickly expels gasses, water and brake dust from the face of the rotor for increased initial bite and improved braking performance.

Kangaroo Paw Design. DBA's 4000 XS Sport Rotors feature their very own hi-tech patented Kangaroo Paw ventilation design. This unique design of 144 diamond and teardrop shaped pillars and columns provides more surface area for improved heat dissipation. DBA's Kangaroo Paw ventilation increases disc rotor efficiency by up to 20 percent when compared to traditional straight vane vented disc rotors.

Thermo-Graphic Temperature Monitoring. DBA 4000 XS Series Rotors feature Thermo-Graphic paint markings that change color at specific temperatures. By carefully checking these temperature markings, drivers can quickly and easily monitor their braking performance.

XG150 High-carbon Alloyed Iron. DBA manufactures their 4000 XS Sport Rotors from XG150 high-carbon alloyed iron for superior strength and its substantial thermal capacity. XG150 cast iron is specifically formulated for high heat absorption and quick dissipation. This makes XG150 the ideal material for high performance brake rotors.

Non-directional. The DBA 4000 XS Sport Series Brake Rotor features a non-directional cross drilled and slotted design that eliminates the need for left and right discs. The non-directional design makes installation simple and straight forward.

Application. This DBA 4000 XS Sport Cross-Drilled & Slotted Rear Rotor is specifically designed for use on 2015-2018 GTs equipped with the standard 4-piston brake calipers or EcoBoost models equipped with the performance pack 4-piston Brembo brake calipers. Sold individually.

Fitment: 2015 2016 2017 2018 2019 Details

CA Residents: WARNING: Cancer and Reproductive Harm -

What's in the Box
  • (1) Rear Rotor
Installation Info
Tech Specs
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Customer Reviews (4) Write a Review

Overall Rating 5

out of 5 stars

Installation Time:Afternoon

  • Fit 5 5
  • Bang For Your Buck 5 5
  • Stopping Power 4.5 4.5

  • 5/5

    Installation Time: Less than 1 Hour

    February 24, 2018

    Great braking

    Ordered theses brake rotors to us on the track, night and day difference from the stock rotors, no brake fad and dissipates the heat well


    Year: 2016 Submodel: GT

    Helpful (0)

  • 5/5

    Installation Time: Afternoon

    June 24, 2017

    dba 4000 xs sport review

    I give these a 10 out of 10, I've had them on my 2016 gt premium for about 3000 miles. The fitment was spot on,simply remove the factory rotors and slide these on. Awsome improvement over stock and not to mention they look badass.


    Year: 2016 Submodel: GT

    Helpful (2)

  • 5/5

    Installation Time: Less than 1 Hour

    June 11, 2017

    Perfect, they look awesome.

    No hassle to install, makes for a great look and better performance


    Year: 2016 Submodel: GT

    Helpful (2)

  • 5/5

    Installation Time: Afternoon

    February 06, 2017

    Coupled with the front these are worth it

    Bought these along with my front rotors, completely changed the performance of the car! Worth every penny!


    Year: 2016 Submodel: GT

    Helpful (3)

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