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034 Motorsports Transmission/Differential Mount, Street Density, Early Audi Models 1980-1996
$36.90

034Motorsport Density Line Performance Differential/Transmission Mounts

If you're looking to upgrade your early Audi's drivetrain performance, the 034-509-4012-SD Density Line Performance Differential/Transmission Mounts are engineered specifically for enthusiasts who value precision and control. Designed for a range of models including the B3 Audi 80/90/Coupe Quattro, Audi UrQuattro, Audi 4000/5000, Audi 100/200, and Audi S2/RS2, these mounts redefine what you can expect from your vehicle's performance.

Performance Meets Durability

Manufactured from high-durometer rubber, these mounts are not just stiffer versions of factory parts; they are a complete redesign aimed at enhancing both comfort and performance. The Density Line Mounts are void-free and fluid-free, effectively eliminating the slop that often plagues stock mounts.

Street Density vs. Track Density

  • Street Density: Made from 50 durometer rubber, this option is about 30% stiffer than stock. Experience reduced drivetrain slop, crisper shifting, and minimal wheel hop, all without sacrificing cabin comfort. These mounts are a true performance solution, not just inserts for the factory mounts.
  • Track Density: For those who push their vehicles to the limit, the Track Density Mount is crafted from 80 durometer rubber, making it approximately 90% stiffer than stock. This results in a locked-down drivetrain, solid shifting, and virtually no wheel hop, although you can expect a noticeable increase in noise, vibration, and harshness (NVH) inside the cabin.

Key Features

  • Constructed from high durometer rubber for enhanced durability
  • Includes new high-grade metric hardware for a secure fit
  • Significantly reduced drivetrain slop for improved performance
  • Decreased differential/transmission movement under load
  • More direct power transfer to the wheels
  • Enhanced shifting feel for a more engaging driving experience
  • Complete drop-in replacement for factory mounts
  • Sold individually for tailored upgrades

Fitment

  • B3 Audi 80/90/Coupe Quattro
  • Audi UrQuattro
  • Audi 4000/5000
  • Audi 100/200
  • Audi S2/RS2
    • Note: This mount replaces factory transmission mounts on later B4 chassis vehicles that use B4/B5 style rear differential mounts.

Replaces OEM Part Numbers

  • 857 599 431
  • 431 399 151D / 431399151D

Customer Feedback

Audi 80 owners have reported, "After installing these mounts, my shifting feels more precise, and the drivetrain feels much more connected. It's a noticeable difference, especially during spirited driving!"

Audi 100 enthusiasts say, "These mounts transformed my car's handling. No more slop, just solid performance!"

Upgrade your Audi's performance with the 034Motorsport Density Line Performance Differential/Transmission Mounts and feel the difference in every shift.

Other Part Numbers:
034 Motorsports #VR034-509-4012-SD

Proposition 65

WARNING: Cancer and Reproductive Harm
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Vehicle
1989-1991
Audi 100
1989-1991
Audi 200
1980-1987
Audi 4000
1982-1988
Audi 5000
1988-1992
Audi 80
1988-1991, 1993-1995
Audi 90

034 Motorsports Logo

Who is 034 Motorsport?

034 Motorsport was founded in 2005 for enthusiasts by enthusiasts with a passion for bringing motorsport-quality performance upgrades and tuning to Audi and Volkswagen vehicles. Since its inception, the company has grown to meet the expanding needs of petrolheads with innovation, quality, and performance in mind. 034 Motorsport is dedicated to providing customers with only the finest performance products, tuning, and service for their Audi or Volkswagen.

Dedicated to the Car Scene

034Motorsport is owned and operated by car enthusiasts just like you! This means that you can count on them for expert advice and products that deliver each and every time. When they aren’t at work, you can find the 034 Motorsport folks at local car meets, Audi Club Track Days, or simply at home working on their own rides.   

Being gearheads themselves, the 034 Motorsport staff understands the importance of a strong automotive community and giving back to the customers they owe their success to. 034Motorsport is a proud sponsor of Audi Club North America's Golden Gate Chapter, in addition to several other popular automotive forums, including Audizine, Fourtitude, VWvortex, and QuattroWorld. The brand also supports NorCal Audi Club, and frequently hosts events for its members.

Involvement in Competition Racing

034Motorsport stays true to its roots (and name) by actively participating in motorsport events, like time attacks, endurance racing, and hill climbs. These events allow the company to simultaneously showcase its products and racing expertise, while putting them to the ultimate test. A number of 034 Motorsport’s most iconic projects, including the Time Attack A4, GTI-RS, and 80tq raised the bar for on-track performance, while also accelerating production and testing processes. 

Extensive Quality Product Lineup

034 Motorsport is well-known for producing some of the finest race-proven performance upgrades for Audi and Volkswagen enthusiasts. The 034 Motorsport performance facility is located in Fremont, California and home to its engineering, manufacturing, and tuning departments. The company prides itself on in-house manufacturing, where it designs, fabricates, calibrates, and tests all products under one roof with complete control. 034 Motorsport carries a wide range of products that includes suspension parts, motor mounts, intakes, silicone hoses, and numerous underhood goodies.

Find 034 Motorsport at Vivid Racing

You can find an extensive lineup of quality 034 Motorsport parts right here at Vivid Racing. We carry everything from 034 Motorsport blow-off valves, cold air intakes, intercoolers, differentials, and ventilation systems to wheel spacers, springs, turbos, mid-pipes, and steering components. Whatever you may possibly need, chances are we carry it! If you cannot find a particular item above or have any questions, please call our sales team at (480) 966-3040.

It is the intention of 034Motorsport to sell only quality products. We offer a 1-year warranty against defects in workmanship or materials, not extending to normal tear and wear or mis-use. You must provide us with a proof of purchase, defect or the result of wear or mis-use. Some products have less than 1-year warranty. Please inquire before ordering.

034Motorsport will only replace or repair warranty items. No refunds will be given. 034Motorsport or the product manufacturer will inspect or test all products prior to a warranty claim adjustment. This process may take up to 6 weeks. You must obtain an RMA number from either Customer Service or Technical Support prior to any return. All products we offer are warranted to be free from defects prior to installation. Any modification or improper use voids this warranty. This warranty does not cover installation. 034Motorsport shall be the final arbitrator in interpreting the extent and remedy of warranty.

034Motorsport warranties are not transferrable, and available to the original purchaser only, however if you do buy a 034Motorsport part second hand and have a problem with it, do contact us as we can typically arrive at a reasonable, fair solution.

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