Direct-Mount Rear Fitment
Vehicle-specific rear direct-mount configuration for Toyota Tundra (XK50) and Toyota Sequoia (XK60).
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Description
2007-2021 Toyota Tundra & 2008-2022 Toyota Sequoia AR4 Direct-Mount Rear Big Brake KitDirect Mount Series Rear Axle 4 Piston 2007 2021 Toyota Tundra (XK50) & 2008 2022 Toyota Sequoia (XK60) AR4 Direct Mount Rear Big Brake Kit The TTSPORT AR4 Rear Big Brake Kit is a Direct Mount Series rear axle upgrade for 2007 2021 Toyota Tundra (XK50) and 2008 2022 Toyota Sequoia (XK60). Forged 4 piston rear calipers, 365 mm 28 mm internally vented rotors, stainless steel braided lines, and vehicle specific fittings help restore balanced rear axle
Direct-Mount Series · Rear Axle · 4-Piston
2007-2021 Toyota Tundra (XK50) & 2008-2022 Toyota Sequoia (XK60) AR4 Direct-Mount Rear Big Brake Kit
The TTSPORT AR4 Rear Big Brake Kit is a Direct-Mount Series rear-axle upgrade for 2007-2021 Toyota Tundra (XK50) and 2008-2022 Toyota Sequoia (XK60). Forged 4-piston rear calipers, Ø365 mm × 28 mm internally vented rotors, stainless-steel braided lines, and vehicle-specific fittings help restore balanced rear-axle braking for towing, loaded driving, and matched front + rear brake builds.
Why Toyota Tundra XK50 & Sequoia XK60 Builders Choose the AR4
Rear brakes do more than add peak stopping force. Correct rear piston area, rotor mass, and caliper geometry help the chassis stay settled under hard braking, reduce front-heavy brake bias, and restore confident pedal feel when the truck is carrying passengers, cargo, or trailer load.
4-Piston Forged Caliper
Two-piece forged aluminum caliper body with 30 mm × 2 / 34 mm × 2 heat-insulated pistons and dust boots.
32.3 cm² Piston Area
32.3 cm² total piston area per caliper helps restore rear-axle braking contribution on loaded truck and SUV builds.
Ø365 mm × 28 mm Rear Rotor
One-piece internally vented rear rotor adds rear thermal capacity while keeping the Direct-Mount Series hardware simple and serviceable.
Vehicle-Specific Brake Lines
PTFE inner liner, SUS304 stainless-steel braid, and PVC protective outer sheath help reduce hose expansion and improve pedal consistency.
Balanced Rear Upgrade
Designed for towing, loaded driving, and matched front + rear brake builds without overpowering the rear axle.
AR4 Direct-Mount Technical Specifications & Kit Options
| Brake Caliper | |
|---|---|
| Series | Direct-Mount Series |
| Model / Application | AR4 |
| Axle Position | Rear |
| Piston Count | 4-piston |
| Piston Type | Two-piece heat-insulated pistons with dust boots |
| Piston Diameter | 30 mm × 2 / 34 mm × 2 |
| Caliper Dimensions | L 270 mm × W 162 mm × H 106 mm |
| Total Piston Area | 32.3 cm² per caliper, all pistons combined |
| Manufacturing Process | Two-piece forged aluminum body |
| Net Weight | 3.20 kg per caliper, without pads |
| Surface Finish | High-temperature gloss coating |
| Recommended Wheel Size | 17 in or larger |
| Recommended Rotor Size | Ø365 mm × 28 mm |
| Brake Rotor | |
| Rotor Material | Heat-treated high-carbon cast iron |
| Axle Position | Rear |
| Rotor Dimensions for This Application | Ø365 mm × 28 mm |
| Construction | One-piece rotor |
| Ventilation | Internally vented |
| Rotor Mounting | Fixed |
| Directional Design | Yes — left/right specific |
| Rotor Face Pattern | Curved slot |
| Brake Pads | |
| Compatible Rotor Material | Iron / steel rotors only |
| Operating Temperature Range | 0–600 °C |
| Average Friction Coefficient | Average μ: 0.38; variation depends on temperature, line pressure, and rotor condition |
| Lines | |
| Brake Line Construction | Three-layer reinforced construction |
| Brake Line Material | PTFE inner liner / SUS304 stainless-steel braid / PVC protective outer sheath |
| Brake Line Fittings | Vehicle-specific fittings; caliper-side and chassis-side fittings vary by application |
| Vehicle Application & Rotor Mapping | |
| 2007-2021 Toyota Tundra (XK50) | Rear · Ø365 mm × 28 mm |
| 2008-2022 Toyota Sequoia (XK60) | Rear · Ø365 mm × 28 mm |
| Fitment & Installation | |
| Primary Vehicle Application | 2007-2021 Toyota Tundra (XK50) · 2008-2022 Toyota Sequoia (XK60) |
| Model Years | Toyota Tundra XK50: 2007-2021 · Toyota Sequoia XK60: 2008-2022 |
| Axle | Rear |
| Caliper Mounting Type | Direct mount |
| Minimum Wheel Size | 17 in or larger |
| Minimum Spoke Clearance | 100 mm |
| Parking Brake Compatibility | Vehicle-specific; confirm exact rear hardware before ordering |
| Brake Line Fitting Type | Vehicle-specific fittings; caliper-side and chassis-side fittings vary by application |
| Bedding-In Procedure | Required |
For 2007-2021 Toyota Tundra (XK50) and 2008-2022 Toyota Sequoia (XK60), the correct AR4 rear rotor specification is Ø365 mm × 28 mm. Confirm 17 in or larger wheels, 100 mm minimum spoke clearance, rear hardware, and parking-brake compatibility before ordering.
What’s Included in the AR4 Direct-Mount Kit
Calipers ×2
2 × AR4 forged 4-piston rear calipers, left/right specific.
Brake Pads
Brake pads for both rear calipers, rated 0–600 °C and intended for iron / steel rotors.
Brake Rotors ×2
2 × one-piece rear rotors, Ø365 mm × 28 mm, heat-treated high-carbon cast iron, internally vented, curved-slot, and left/right specific.
Brake Hoses ×2
2 × three-layer stainless-steel braided brake lines with PTFE inner liner, SUS304 braid, PVC protective outer sheath, and vehicle-specific fittings.
Mounting Hardware
Vehicle-specific direct-mount hardware for Toyota Tundra XK50 / Sequoia XK60 rear-axle installation.
Direct-Mount Series uses one-piece rotors and direct-mount rear calipers. Rotor Hats and Caliper Brackets are not used on this AR4 application.
Will It Fit Your Toyota Tundra XK50 or Sequoia XK60?
AR4 requires 17 in or larger wheels with at least 100 mm of spoke clearance. Rear parking-brake compatibility and vehicle-specific brake-line fittings must be confirmed before ordering.
1. Wheel Diameter
17 in or larger wheels are required.
2. Spoke Clearance
Minimum spoke clearance: 100 mm. Check spoke shape, offset, spacer use, and inner barrel profile before ordering.
3. Vehicle Model
Application: 2007-2021 Toyota Tundra (XK50) and 2008-2022 Toyota Sequoia (XK60), rear axle, with Ø365 mm × 28 mm rotor specification.
Send your model year, trim, rear brake hardware photos, wheel specs, and front brake setup before ordering so TTSPORT can confirm compatibility.
Installation & Bedding for Toyota Tundra XK50 & Sequoia XK60
- This AR4 kit is engineered for the rear axle of 2007-2021 Toyota Tundra (XK50) and 2008-2022 Toyota Sequoia (XK60).
- The correct rear rotor specification is Ø365 mm × 28 mm.
- Direct-Mount Series uses vehicle-specific rear mounting geometry and vehicle-specific brake-line fittings.
- Parking-brake compatibility depends on exact rear hardware configuration and must be confirmed before ordering.
- Confirm 17 in or larger wheels and 100 mm minimum spoke clearance before ordering.
- Rear brake performance is best when paired with a properly matched front setup. Confirm your front brake configuration before running a rear-only upgrade.
- A proper bedding-in procedure is required to transfer pad material evenly to the rotor face and stabilize friction performance.
- Professional installation by a qualified brake technician is recommended.
Toyota Tundra XK50 & Sequoia XK60 AR4 Rear Big Brake Kit FAQ
Will this AR4 rear kit fit 2007-2021 Toyota Tundra XK50 and 2008-2022 Toyota Sequoia XK60?
Yes. This AR4 Direct-Mount rear kit is configured for 2007-2021 Toyota Tundra (XK50) and 2008-2022 Toyota Sequoia (XK60). The correct rear rotor specification is Ø365 mm × 28 mm.
What axle and rotor size does this AR4 kit use?
This is a rear-axle kit using Ø365 mm × 28 mm one-piece, internally vented, directional rear rotors with a curved-slot face pattern.
What wheel size and spoke clearance are required?
17 in or larger wheels are required, with at least 100 mm minimum spoke clearance to the rear caliper. Wheel diameter alone is not enough; spoke shape, offset, spacer use, and inner barrel profile must be checked before ordering.
Does this kit include rotor hats or caliper brackets?
No. This is a Direct-Mount Series AR4 application with one-piece rear rotors and direct-mount rear calipers. Rotor Hats and Caliper Brackets are not used on this configuration.
Is parking brake compatibility retained?
Parking-brake compatibility is vehicle-specific and depends on the exact rear hardware configuration. Confirm your model year, trim, and rear brake hardware with TTSPORT before ordering.
Can I install this as a rear-only upgrade?
It can be installed as a rear upgrade, but rear brake performance is best when paired with a properly matched front setup. Confirm your front brake configuration with TTSPORT before running a rear-only upgrade.
Is bedding-in required?
Yes. A proper bedding-in procedure is required to transfer pad material evenly to the rotor face and stabilize friction performance.
Ready to spec your AR4 Tundra or Sequoia rear brake build?
Need rear fitment confirmation, wheel clearance review, or a matched front + rear brake setup?
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
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
4.1 ★★★★★
Based on 25 reviews
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Product Reviews
★★★★★ 3
Might Work For You If There is Never Anything On Your Floor
Color: Black
Well, after having this for about 3 months now, I have to say that I am mostly unimpressed. A friend of mine talked me into getting this specific model because she owned and said she did a ton of research and it was the absolute best for pet hair. I old her thats great, but is it really going to get around and pick up all the dog hair without me having to constantly deal with it? Well she said yes, but I find the answer to be a resounding NO.
First off, the wheel constantly clogs. You basically have to clean the floor before you have the vacuum go clean the floor, otherwise it will get jammed on something, napkins/papertowel/softener sheets or plush stuffing from dog toys seem to be what generally causes the roller clogs on my machine. That is of course when it isn't trying to suck up a bathroom rug, or rag left on the floor.
I certainly can not allow it to just do a whole home clean. Even if it wasn't going to get caught on something, in my 1340 sq ft home with 3 dogs it can't handle picking up all that dirt without being emptied at least once first. I definitely have to empty it before and/or after every use.
I will say that while it remains connected to the network (I have google fiber so I know it isn't weak network issues) the app provides some nice abilities like creating partitions and splitting up rooms. I do like that I can tell it to clean certain areas, then let it go back and charge, empty it, and then tell it to clean different areas. That said, being able to get into the vacuum options is not obvious and takes a little digging. I also find that it doesn't do a great job of cleaning against walls or in corners.
All of my floors are hard surfaces (tile or laminate flooring) so I can't tell you how well it works on the carpet. When I can use, after I have picked up anything that might clog it, I will say that it generally makes it so I don't have to do much sweeping, which is nice, but still, for the price, is it really worth it?
I am too afraid to try to use the mop capabilities. I don't trust it at all to actually mop and not just make a wet mess.
I am also guessing I am probably going to need to replace the roller sooner than later, at least taking the roller on and off mostly pretty easy. While removing the dust chamber isn't particularly difficult, setting it back in isn't hard, but you do have to get it just right, which rarely ever happens on the first try, so you do have to futz with it a bit, usually.
Over all, not sure I would buy one again, but I think if I did, I would at least get one that self empties, would save me a little bit having to constantly empty it myself.
For reference purposes, I have a 1 story home that is about 1340 sq ft. I rarely have it vacuum in the bathrooms or closets, so I am saying it needs to be emptied at least once if not twice to just deal with the remaining parts of the home.
I also think it is fairly noisy. Certainly not as noisy as an upright "real" vacuum, but I can definitely hear it vacuuming and bumping into things while it is in entirely different rooms than the one I am in.
Lastly, I hate having to deal with reconnecting it to the network, it is a real pain. The app has never worked for me as far as scanning the QR code goes. I didn't use it for about a week, and it disconnected itself from the network. I had to go through the reconnection steps 3 times to get it back on the network, and then it said my map had changed (it hadn't, and it has had this hiccup twice before as well) so I had to reset it one more time before it finally fully recalibrated and I was able to use it again.
I generally have to go check on it a few times as it is cleaning and make sure it is actually picking up dirt etc, because if one of its ports gets clogged early with maybe some stuffing, or a napkin, or larger towel, it won't pick up anything else but it will keep running and not tell you there was any issue. It just tells you it is finished and then you still see stuff all over the floor and know something must have clogged it.
I haven't owned any other robot vacuums so I can't tell you how it stacks up against the other brands. My guess is they are all pretty similar or worse, but maybe you will have better luck than me.
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Reviewed in the United States on May 21, 2026
★★★★★ 5
Very good product with a poor ap **UPDATED TWO YEARS LATER** Please read for useful troubleshooting
OK, it has been two years and I am updating my review. I am keeping the 5 stars because the vac is working as good now as it was when new. But it has not been without its ups and downs.
After about a year, I began to notice it wasn't picking up nearly as good as it once did and I started looking for new vacs. I stumbled across a review for a completely different product. This reviewer, having the same problem, different product, had found a "hidden" filter deep inside his vac. So, one day when using my leaf blower outside, I decided to use it to blow out the q5. Dust went everywhere and I was amazed at how much the vac quieted down and began suction like new! Apparently I hadn't noticed the increase in noise as the vac labored against restricted flow. It was nothing short of a complete renewal. But, I began to have problems with the cliff sensors. It would falsely sense a cliff and refuse to vac that area. I noticed a buildup of dust INSIDE the cliff sensors. (apparently they are not airtight) With a can of compressed air, I was able to blow out the sensors and it straightened right up, again to like-new efficiency. I have integrated the practice of blowing compressed air into the sensors as well as EVERY crevice that dust could accumulate into my cleaning/emptying routine and now, two years after purchase, I get like-new performance from the q5. I would still recommend this, just be prepared for a still-clunky app that you WILL become accustomed to. Good Luck!!
OK, so I'm giving this five stars because it is so much better than I had anticipated and I want people to read this review. The product itself IS five-star. The ap, maybe two. Keep in mind that I haven't had it too long and maybe with a little more experience, the ap might be more palatable. But here goes:
I use this in a basement where the floors are mostly smooth concrete, with one room low-pile carpet. As long as you keep the vac emptied, it works great. I have a husky dog and his undercoat shedding is a disaster of epic proportions. It sucks up his hair like a champ on both surfaces. When it gets pretty full, it will dump dog hair and dust at the edge of every rug it passes over. But that's my fault. The robot seemingly wanders around like a drunk, and somehow it unerringly chases after the dog wherever he goes, but it knows what it's doing once it maps out the area. The problems come when you want it to do something different, like just clean one of the rooms. Most of the time, the selection on the ap to select just one room simply doesn't work. Sometimes it does, so I know I'm doing it right. You can install an "invisible wall" but so far it has been impossible for me to put in a HORIZONTAL wall, so I gave up. Putting in a "zone" has been more successful, but still a pain. The only thing in my areas that it will not clean are the door mats, made of very thin carpeting. Hair gets stuck in there and the vac simply can't suck or scrub it up. But that's minor. I can scrape the hair off with a shoe and the vac obligingly sucks it right up. Overall, this was good purchase and I can't imagine dealing with "Operation Fur Drop" without it.
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Reviewed in the United States on June 14, 2023
★★★★★ 5
User friendly and I highly recommend
Color: White
I recently purchased the Manvins Robot Vacuum and Mop Combo with WiFi capabilities, and it has been a game-changer for keeping my home clean. The setup was incredibly easy, and I was able to connect it to my smartphone in minutes using the app. Once connected, I can schedule cleaning sessions, monitor progress, and control the vacuum and mop remotely, which is super convenient.
The vacuum picks up dust, pet hair, and debris effortlessly, even from carpets. The mop function is a nice bonus, and it does a great job of leaving floors streak-free. I was surprised at how well it handled both tasks simultaneously, and it’s great to not have to worry about switching between modes
The WiFi feature really shines when I’m away from home. I can activate the cleaning process from anywhere, and it returns to its charging station when it’s done. It even maps out my home as it cleans, ensuring that it doesn’t miss any spots.
Overall, this robot vacuum and mop combo has made cleaning much more efficient, and I love how easy it is to keep my floors spotless with minimal effort. Highly recommend it for anyone looking for a smart, reliable cleaning solution!
Sent from my iPhone
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Reviewed in the United States on December 30, 2024
★★★★★ 5
Excellent vacuum!!
Color: White
This is a hard working little robot. It cleans dirt and debris so easily and even gets the Arizona dust that accumulates everyday. I have a cat the sheds and 4 boys plus my husband and this vacuum works like a champ. I haven’t tried the mop feature yet because I just haven’t sat down and read the directions. I’ll update when I try that feature out. I love that it can go under my furniture and climb up rugs, even my cat scratch boards. I 100% recommend this vacuum. It has changed my house keeping routine and saves me a ton of time. I absolutely love it and you can’t beat the price!
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Reviewed in the United States on November 15, 2025
★★★★★ 5
Pleasantly surprised.
Color: White, Color: White
Based on the price I wasn't expecting much but boy was I wrong. I'm so impressed and thrilled with this purchase. I have a long haired Maine Coon and it picked up so much fur. It picked up thread, small pieces of yarn and feathers from my pillows. I watched the long front brushes pull dust and dirt out from under spaces that my regular vacuum would never get without moving things. I have carpet, hardwood, throw rugs and even a long shag throw by my bed that it maneuvered over mostly easily. I helped it over one or two transitions but it never got stuck. Just turned and kept going. The mop worked great. Only concern is that it only uses water so it's not a deep clean but the pad was dirty and once it dried I threw it into the wash. Definitely will use it in between a deeper cleans making cleaning a whole lot easier. With a cat shredding the carpet on a scratching post and all of his fur I was shocked how packed the dirt cup was and how great the house looked with all the little bits of scratching pole, oh yeah and card board scratching pad cleaned up so easily. I highly recommend. The cat thinks it's a cat toy so he kept starting it up. I had to cover it to protect it from the cat. It now lives under it's very own plastic bin. 🙂
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Reviewed in the United States on March 13, 2025
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