034Motorsport's Motorsport StreetSport Mounts for Audi 8N TT 1.8T & Volkswagen MkIV Golf 1.8T models are the new standard in ultra-high performance. These mounts are designed with extreme performance in mind, manufactured from billet aluminum and high-durometer rubber, making them virtually indestructible, while maintaining better ride characteristics than polyurethane alternatives. These mounts have a lifetime guarantee regardless of power level applied and type of track racing they are used for.
Motorsport StreetSport Mounts are void-free and fluid-free, eliminating the slop associated with the factory engine/transmission mounts, and are designed to be completely rebuildable with replaceable Density Line rubber bushings. These heavy-duty mounts will result in a moderate increase in noise, vibration, and harshness (NVH) transfer into the cabin, as they are designed to drastically reduce engine movement compared to the factory parts, but will introduce less NVH than our TrackSport mounts due to the lower-durometer rubber used. Additional NVH is most noticeable at idle, but once the vehicle is moving, NVH is slightly higher than stock.
HIGH-DUROMETER RUBBER VS. POLYURETHANE:
Density Line Mounts are manufactured from high-durometer rubber instead of polyurethane for a number of reasons. While vulcanized rubber mounts are more expensive to prototype due to increased complexity of manufacturing and high initial tooling costs, rubber is inherently better than polyurethane as a damping medium for mounts and bushings.
Rubber is able to deal with stress under both tension and compression, while polyurethane mounts rely on the damping medium to be effective only under compression. Rubber is also excellent in shear, where polyurethane is ineffective, making it ideal for applications that apply a shear force to the bushing during articulation. Rubber does not pack and wear like polyurethane does, which ultimately results in a long-lasting part with consistent performance.
BUYER'S GUIDE:
The following guide is designed to help customers choose which mount best meets their specific needs.
StreetSport
  
TrackSport
Power levels exceeding Stage 1
  
Power levels exceeding conventional stages
Car is launched or taken to HPDE or Drag events
  
Car is heavily launched at drag strips or only used for track events
Car is used on road as a commuter
  
Ultimate performance and rigidity is desired 
Less NVH is desired
  
"Where we're going, we don't care about NVH!" 
 
FEATURES:
Manufactured from 6061-T6 Billet Aluminum
Anodized for Long Life and Great Looks
Extreme-Duty for the Most Punishing Performance Applications
Great Solution for Highly-Tuned Stock Turbo Power Levels
Replaceable 50 Durometer Density Line Rubber Bushings with Void-Free Construction
Significantly Less NVH than TrackSport Version
Virtually Indestructible
Lifetime Warranty
Reduced Drivetrain Slop
Decreased Engine Movement Under Load
More Direct Power Transfer
Improved Shifting Feel
Complete Drop-In Replacement of Factory Engine/Transmission Mounts
Sold in Pairs
NOTES:
Lifetime warranty covers replacing Density Line rubber bushings should they ever wear out, and replacement of any billet aluminum component in the unlikely event of a failure.