SKU: 17460248624

034 Motorsport 2-Piece Floating Rear Brake Rotor 370mm Upgrade for B9/B9.5 Audi A4/S4, A5/S5, Q5/SQ5, & RS4/RS5

Sale price$730.94 Regular price$812.16
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Ships within 48 hours · Estimated delivery Aug 1 - Aug 6

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Description

034 Motorsport 2-Piece Floating Rear Brake Rotor 370mm Upgrade for B9/B9.5 Audi A4/S4, A5/S5, Q5/SQ5, & RS4/RS5The 034Motorsport 370x22mm 2 Piece Floating Rear Brake Rotor Upgrade for B9 B9. 5 Audi A4 S4, A5 S5, Q5 SQ5, & RS4 RS5 is a complete replacement brake rotor and caliper carrier kit, designed to work flawlessly with the factory rear calipers. Upgrading your rotors will increase overall braking performance in street, track, and HDPE driving conditions, as they keep your brakes cool and strong all day long! Weighing in at approximately 15. 1lbs, each


The 034Motorsport 370x22mm 2-Piece Floating Rear Brake Rotor Upgrade for B9/B9.5 Audi A4/S4, A5/S5, Q5/SQ5, & RS4/RS5 is a complete replacement brake rotor and caliper carrier kit, designed to work flawlessly with the factory rear calipers. Upgrading your rotors will increase overall braking performance in street, track, and HDPE driving conditions, as they keep your brakes cool and strong all day long! 

Weighing in at approximately 15.1lbs, each rotor reduces rotational weight by 1.6lbs on each corner over the factory 16.7lbs rotors, and increases rotor diameter from 330mm to 370mm! While reducing weight, the rotor retains proper thermal mass in the rings to adequately capture heat, while utilizing 36 directionally curved vanes to forcefully flow cool air through the rotor to dissipate heat.

Upsizing the rear rotor size from 330mm to 370mm repositions the caliper further outward, increasing its leverage on the rotor. With this added leverage, the factory rear caliper can generate more braking force at the rear axle. This not only improves rear-end braking performance, but also helps take stress off the front brakes during hard stops. The result is a more balanced braking system with better stability, reduced front brake overload, and enhanced overall stopping confidence.

The central hat portion of the 034Motorsport rotor is made of 6061-T6 aircraft specification aluminum. The disc is constructed out of a proprietary metal alloy that can withstand immense braking temperatures while holding form. The rotor utilizes 36 directionally curved vanes to forcefully flow cool air through the rotor to dissipate heat.

The face of the rotor utilizes J-Slot slots to clean the pad surface of contaminants and allows hot pad outgassing.

The rotor and hat have a floating mount system that utilizes high-strength alloy steel bobbins. The pins take the load from braking actions while maintaining the axial and radial float between the hat and disc, allowing for safe expansion and contraction from heat.

Features:

  • Lightweight Construction (15.1lb 370mm 034Motorsport Rotor vs. 16.7lb 330mm OE Rotor)
  • Floating, 2-Piece Design
  • Aerospace Grade Aluminum Hats with Type III Hard Anodizing**
  • CM-250 Special Alloy Rotor Rings
  • J-Slot Slotted Friction Face
  • OEM Fitment & Functionality
  • 36 Curved Vanes Force Cooling Air through Brake Disc
  • Floating Bobbins Mounting System
  • Replaceable Rotor Rings
  • Lower Long-term Maintenance Cost

Part Number Interchange for A/S Models:

  • 8W0 615 601 E
  • 8W0 615 601 K

Part Number Interchange for RS4/RS5:

  • 8W0 615 601 G

What's Included:

  • 034Motorsport 2-Piece Floating Rear Rotor Pair
  • Caliper Carrier Conversion Brackets

**Please Note: Type III hard anodizing of aluminum is considered as a functional surface coating process. While we always aim for color consistency, color variations may exist from batch to batch due to the nature and variables in the anodizing process.


Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. 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
SKU: 17460248624

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4.1 ★★★★★
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John Crisafi
Lake Worth, US
★★★★★ 5
Works very well, easy to use, print great
Paper Size: 8.5-x-11-inch, Paper Size: 8.5-x-11-inch
This was my first time using this kind of decal and I found them to be pretty easy to use and effective. I followed the instructions and all of my projects turned out perfectly. Print quality was good and I had no issues with the ink drying. I bought this because my kids love Bluey (the animated show from Australia) so I wanted to make them some wooden Bluey coasters. I bought some 1/2 inch thick poplar stock from HD, cut it into 3.5 inch squares and sanded them smooth. I added a coat of acrylic clear and let that dry, then lightly sanded it so that the water would not raise the grain of the wood. I followed the instructions for these decals and printed them out on my Canon inkjet printer. I let them dry for about 10 minutes and then took the sheets outside and sprayed them with acrylic clear coat twice, with a few minutes between coats, as the can said. I did it again the next day for a total of 4 coats. I cut them out and the submerged one in filtered cool water. While it was submerged, I wiped a coaster with a bit of water. After 20-30 seconds, I took the decal out and placed it on the coaster and gently slid the decal off the paper a bit, then I grabbed the paper backing and slid it out while I held the decal in place. I adjusted it a bit and then smoothed it out and dabbed it lightly with a clean towel. I checked for bubbles and smoothed more with wet fingers, then I dried them again with a towel and let the whole thing dry overnight. The next day, I sprayed 2 coats of acrylic clear coat and the same again a day later. Then I added thin felt pads to the back to let them slide on the table. So far, they have held up well. The decals still look good and they aren't coming off. I did mess up one because I put on too thick a coat of acrylic by accident and it made the decal peel. One coaster was left with water on it overnight and there was no problem the next day when I wiped it off. Good coats of sealer are essential to seal the ink and the coaster, then the whole process seems to go well consistently. I had one or two decals in my second batch that ripped that were entirely my fault. You have to be gentle and I pulled too hard when repositioning the decal. For sure I will buy these again. They are great for small projects for personal use.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 24, 2021
E
Verified Purchase
Ed
Omaha, US
★★★★★ 5
Works as intended
Paper Size: 8.5-x-11-inch
Good quality
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 8, 2026
L
Verified Purchase
LINDITA ARIAS
Carnegie, US
★★★★★ 5
Excelente calidad
Paper Size: 8.5-x-11-inch
Excelente
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 22, 2026
K
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Kindle Customer
Port Orchard, US
★★★★★ 4
Easy to follow instructions, odd colors
Paper Size: 8.5-x-11-inch
If you follow the instructions they go onto plastic like a dream. That being said expect to play with color settings a lot if you're doing anything other then blacks. Browns tend to bleach out and turn orange.
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Reviewed in the United States on December 12, 2024
B
Verified Purchase
Beth Magruder
Carnegie, US
★★★★★ 5
Perfect product!!
Paper Size: 8.5-x-11-inch, Paper Size: 8.5-x-11-inch
Perfect for the project I needed it for, Valentines day roses will never be the same again
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 23, 2026

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