With the car still in the air on the lift from the previous upgrades, it was time to tackle the suspension. We knew that virtually all MK5 VW platform based applications utilized effectively the same suspension setups, so there we ample options available to us. With that said, however, we have become friendly with Eibach Springs UK due to having worked cooperatively with them on some other projects, and we were keen to work with them again, so they were tremendously gracious enough to provide us with their Pro-Kit coilover suspension system for this project. The system includes full replacement front struts with threaded bodies to allow for height adjustment of the spring perches, and new rear shocks as well as adjustable perches for the rear springs. Partially to help facilitate easier installation, and to determine how low the setup would actually allow the car to sit, we adjusted all components to their lowest possible settings prior to installation. ***Yes, this upgrade will result in bypassing the OEM electronically adjustable shocks equipped on the TTS from the factory. A suspension fault warning light will appear on the dash, but is easily disabled with a resistor that matches the electronic resistance valve of the OEM shocks. This is not included. As we are also concerned with saving as much weight as possible with this project, we made certain to compare the weights of every component being replaced and/or removed. The total weight savings from swapping the OEM suspension for the Eibach Pro-Kit coilovers amounted to 8.5 lbs. The front strut and spring assemblies were exactly 2 lbs lighter per side. The OEM's weighed in at 14 lbs each and the Eibach assemblies weighed in at 12 lbs. Since the upper spring perches were being reused, there was no need to weigh them. Surprisingly, the Eibach rear shocks were marginally lighter than their OEM counterparts as well. The OEM units weighed in at 6 lbs each, while the Eibach units weighed 4.5 lbs each. Again, the rear upper mounts were reused. The OEM rear springs, the rubber perches, and the electronic cap for the adjustable rear shocks weighed in at 4.25 lbs, while the Eibach rear springs and perches weighed in at 3.5 lbs. With all of the parts weighed, we proceeded with the install, which was pretty straight forward for a transverse engined VW/Audi application. There were no surprises really. As mentioned above, installation is made easier by adjusting each spring perch to its lowest setting prior to install, which reduces the overall height of the parts and enables easier fitment of the front upper mounts and easier fitment of the rear springs. We lowered the car back down onto the ground, and this is exactly how it sat. While there was undoubtedly a little settling left to occur, the rear visually appears slightly lower than the front, however, the body is actually perfectly level to the ground. The alignment was clearly thrown off by the dramatic lowering as evidenced by the tremendous amount of screeching from the front tires as they scrubbed along the shop floor when moving the car, so that was remedied the very next day by a complete alignment and corner balancing at a local shop, Performance Race Solutions. While this resulted in a more visually balanced ride height with the rear raised up slightly, more importantly, significantly improved handling and vehicle dynamics resulted. Turn in response was drastically improved, and any understeering experienced previous was nearly completely eliminated. The car became much more predictable when cornering, and could be induced to slide with little effort, thanks in no small part to the Haldex controller set to Race mode as well. :thumbsup: For anyone that will be using their car on a track of any kind, a proper corner balancing is a must. Many thanks are owed to Eibach Springs UK for their generous support of our project, and we genuinely cannot speak highly enough of the result of this upgrade. The car handles incredibly well with absolutely no compromise of the ride quality in any way.