SKU: 28172877353

Rear Stoptech Slotted Rotors - Set of 2 Rotors (330x22mm) B8 S4 | S5

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Description

Rear Stoptech Slotted Rotors - Set of 2 Rotors (330x22mm) B8 S4 | S5Power Slot Rotors Power Slot rotors are 1 piece, slotted, direct replacement discs for your factory brake system and stock calipers. They offer improved cooling as well as other advantages the competition doesn't offer. Launched in 1998, Power Slot was the first premium slotted replacement rotor program in North America. Innovations include e coating, double disc grinding, full machining, mill balancing and center split castings, as well as the



 Power Slot Rotors

Power Slot rotors are 1-piece, slotted, direct replacement discs for your factory brake system and stock calipers. They offer improved cooling as well as other advantages the competition doesn't offer. Launched in 1998, Power Slot was the first premium slotted replacement rotor program in North America. Innovations include e-coating, double-disc grinding, full machining, mill balancing and center-split castings, as well as the availability of directional vanes, cryogenic treatment and the use of Power Alloy. Today, Power Slot covers more than 2500 applications, all machined in Power Slot's California manufacturing center. Every Power Slot rotor is a direct replacement for a factory brake rotor, allowing the retention of factory calipers in the system.

Most Power Slot rotors match the original factory cooling vane design. In the most popular sports car and light truck applications, Power Slot has improved the design by using directional (left- and right-handed) vanes to improve cooling. This represents a distinct upgrade from the original equipment rotors, which usually feature a straight vane or pillar vane design. The directional vane is a more efficient air pump. The resulting increase in airflow translates into greater resistance to brake fade and faster recovery from temperature spikes generated by aggressive braking maneuvers.

Power Slot rotors feature a signature "short slot" design. The slot improves brake system performance by wiping away the debris of used friction material that otherwise accumulates between the rotor and pad. This keeps fresh pad material exposed to the rotor surface and helps prevent pad glazing. The edges sweeping the pad slightly increase the effective coefficient of friction, or "bite", amplifying brake system response to pedal input. By providing an escape path for water, slotted rotors can also improve initial brake response under wet conditions.

Every Power Slot rotor is finished with a black e-coating on both sides of the hat, inside the cooling vanes and on the outside edge. E-coating is a superior electro-statically applied finish designed to withstand 400 hours of salt water exposure without rusting. This is especially important on both mounting faces of the hat where it touches the hub flange and back face of the wheel. Any accumulation of rust in these areas can lead to installed lateral runout issues.

Power Slot rotors feature a double disc ground, taper free finish. Double disc grinding ensures parallelism, eliminates run out and provides near perfect disc thickness variation (DTV). Double disc grinding leaves a non-directional finish on the friction surface area for more effective pad and rotor break-in. This special finish also provides quieter and smoother stops.

Power Slot rotors feature 100 percent fully machined finishes including rotor hats. This extra process provides better rotor balance and creates a cleaner, more finished looking component.

Power Slot brake rotors are mill balanced to a tolerance of less than 2 oz-inch. This additional machining operation reduces feedback associated with rotor vibration and provides a smooth, confident application of braking force.

Center-split core castings provide proper heat transfer and thermal efficiency, resulting in superior braking power and safety.

Power Alloy metallurgy is another unique feature in many of Power Slot's rotors. Quality and performance live inside the rotor too. Choosing the correct foundry partner and working to improve the metallurgy are all part of Power Slot's continuous improvement process that helps to reach established targets for hardness and tensile strength. Many of Power Slot's top-selling part numbers are cast using this Power Alloy iron specification, an enhancement in the carbon and molybdenum content of the iron. Carbon and molybdenum promote crack resistance and improve noise, vibration and harshness (NVH).

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 28172877353

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4.4 ★★★★★
Based on 9 reviews
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M
Verified Purchase
Michelle
Birmingham, US
★★★★★ 5
Exceptional - Better than one twice the price
Size: 15.6" 1080P
I bought a different external monitor a few years ago for twice the price and it was abominable compared to this monitor. This monitor is absolutely perfect. The speakers are definitely tinny like others mentioned, so don't expect to DJ a party with this thing, but for work it's perfect since that means voices are clearer anyways. The sound just isn't as full/rounded with proper bass, but it doesn't even matter because there's also a headphone jack on the monitor, too. USB-C is a total game changer for powering and passing full audio-visual in a single port. The included cables are also a big win since getting a spare data USB-C cable can get pricey and I know the one included is guaranteed to work with this monitor. It was literally plug-and-play with my 2023 16" Macbook Pro. I could go on and on about how every detail of this monitor is perfect, like how the stand is also a screen protector cover and how light and easy it is to carry and how the little grippy feet hold it in place confidently, but my point is THIS is FINALLY the external monitor I've been looking for!!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 26, 2026
B
Verified Purchase
Brian
Whiting, US
★★★★★ 5
Great portable display for the price.
Size: 15.6" 1080P
This monitor works very well. I bought because I needed an extra monitor for my iPad on my work desk. But I don’t have an outlet at this desk. The iPad powers the monitor just fine, though it drains the battery pretty quickly. I ended up also buying a 20ft USB-C cable and running that to the nearest outlet to power the monitor and my iPad. I also have a little phone holder standing the display up. The quality is pretty good for the price point. Definitely not my highest quality screen. It's perfect for spreadsheets and the colors are very passable anyway.
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Reviewed in the United States on May 21, 2026
A
Verified Purchase
Andrea Elizondo
Draper, US
★★★★★ 5
Really good.
Size: 15.6" 1080P
Perfect size. Love the cover that comes with it. Easy storage and portability. Perfect to work on the move. The screen itself looks really good for the price. I connected with the type c and turn on and off as my computer does. Amazing and easy to connect. Doesn't flickers.
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Reviewed in the United States on May 2, 2026
D
Verified Purchase
D. Christensen
New York, US
★★★★★ 4
Overall great value, for the stated purpose of being a portable monitor
Size: 15.6" 1080P
This is a review of two monitors: MNN Portable Monitor 15.6inch FHD 1080P (no model number listed) M156F01 is marked on the box Arzopa Portable Monitor, 15.6'' 1080P model number: “S1 Table” I ordered the Arzopa monitor first, as kind of an impulse buy. I was going to be traveling and wanted to take my mini Ryzen 9 PC with me, but it had no monitor. I found the Arzopa monitor had good reviews and the price was right so I ordered. Then later I discovered it was a MATTE panel. I’m not sure how I missed that earlier, but I would NOT have ordered it if I knew that it was matte. Matte finishes on monitors are supposed to be easier on eyes as the matte surface supposedly reduces glare. But in my experience, there is a problem with this feature. First, any monitor positioned properly should never have a problem with glare. For example, you don’t position a monitor facing a large window or another source of strong light. If your monitor is positioned correctly, glare should not be a possible problem to be solved. Second, the matte finish on most monitors I have seen tends to greatly distort the picture quality. Imagine you are standing outside at noon, but the area you are in is foggy. The view you have of your surroundings (through a light fog) is similar to the picture quality of any matte finish monitor. At least, in my experience. I was sitting in front of my two large (not portable) monitors, thinking about the mistake I made in ordering a matte finish portable monitor. And I realized…I was so used to using dual monitors that I would really want two monitors for travel, also. I read some reviews of the MNN monitor and someone described it as a GLOSSY panel. Perfect. I decided to order the MNN to use as my “primary” travel monitor with the Arzopa to be used as my “second” monitor for a dual monitor setup while traveling. That led to mistake number 2. They are both matte finish. When I realized this, they had both shipped. And they were delivered very quickly , both arriving on the same day. I decided to give these monitors a try, and I’m glad I did. While they are both described officially as “matte”, the picture qualify is closer to what I would expect from a true “glossy” surface computer monitor. And they both have much more than acceptable image quality. So to compare them: FEATURES: Their features are identical other than their physical controls. For adjusting these monitors, there is a difference between them, and I PREFER one over the other, as far as controls go. Arzopa has multi-function push buttons on the left to adjust settings like brightness/contrast. MNN has push-buttons and a teeny tiny joystick on the right to adjust settings like brightness/contrast. I think this is an odd design decision for a -portable- monitor. The Arzopa controls are both more intuitive and (I believe) probably more sturdy / more likely to be reliable over time. We’ll see if the tiny joystick of the MNN survives a few trips bouncing around in my checked bags. DISPLAY QUALITY I was very pleasantly surprised by the image quality of both of these monitors. I would rate them both a solid 9/10 on image quality. I’ve seen better, but only with OLED panels. Between the two if I had to pick a winner for image quality it would be the MNN. But the difference is so slight. I think they both deserve a “9”. While I can tell they are both matte (and I do not like that) the matte finish of these monitors is not as “foggy” as most matte monitors. It’s not matte enough to detract from the overall image quality, which is great. The factory settings of both monitors had the brightness (black lefel) set too high. Brightness is what controls how “black” black items will appear. If the Brightness is set too high, then something which should be color black will appear to be gray or (worse) even light gray. After I turned down the brightness a bit on both monitors, the black level of both was very satisfying. Speakers: I would never try to use speakers on a portable monitor, so I can’t comment on this. I don’t think the Arzopa even has speakers, but it doesn’t matter, as I would not use those. STAND: They have virtually identical magnetically attached pleather stands that can be used to support the monitors in vertical or horizontal orientation. The magnets on both are pretty weak. However, it should be adequate for use on a solid desk or table. You might not be happy on an airplane if you hit turbulence at all. Summary and suggestion for improvement: I would give both of these a 4-star rating on the Amazon scale. To earn a 5-star rating I would suggest: 1) Replace the magnetic stand with something that attaches to the monitor more firmly. 2) Include a USB-C cable with a right-angle connector on one end. For dual monitor use, these both have cables sticking out the left side. If you want to set them side by side, you need to keep them about 2” apart, because the cables interfere with setting them close together, like you want to. The most obvious solution would be a right-angle USB-C cable. I have ordered one. But it would cost nothing for Arzopa and MNN to include this. 3) Make the above changes without increasing the price. If you could do that, I would rate these monitors a solid 5/5. There are better monitors for sale. But for the stated purpose and price? These are close to what I would want. Very close. FINAL THOUGHT: (Which One Should I Buy?) There are many portable monitors available with plenty of options in the same relative price range. The two I am reviewing here are a couple of the most highly rated. If you are trying to choose between these two specific monitors, I would recommend you buy the Arzopa. While the MNN has slightly better image quality, they both have really good image quality. I think the design of the Arzopa is just a bit more appropriate for the stated purpose of being portable. If you are leaning toward the MNN however, I would not discourage you from buying it. If you’ve narrowed down your decision to these two specific monitors, I don’t think you can possibly choose “wrong” if you buy only one of them. They both exceeded my expectations.
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Reviewed in the United States on February 16, 2025
H
Verified Purchase
Humberto
West Palm Beach, US
★★★★★ 5
Great product
Color: Black, Size: Case for iPad (A16) 11th/10th Generation 11/10.9''
Easy to install, Really fit well, durable and look good and the customer service was really nice when I need something
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 25, 2026

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