I installed everything except the drive shaft over the weekend (still in the mail) and thought I'd post some initial impressions.
SR performance LCAs - I installed these first and drove around for a day before adding anything else. The rear feels much more planted with these, even on a brembo GT, which I've heard already have stiffer LCAs. For $120 it's a no brainer, should have done it a long time ago.
The pieces themselves looked well constructed and high quality. Had some slight difficulty getting one of them to reach the bracket sufficiently to get the bolt through. After some cussing and elbow grease later, I got the bushing to stretch enough to get the bolt through.
Whiteline transmission mount insert - I cut about 1/2 inch off the lower lip before installing after reading some of the stories of extreme additional NVH. The part works as advertised, the shifter feels is improved. The increase in NVH was pretty substantial still but so far pretty pleasing to me. The car feels more visceral with more vibration coming through the shifter, steering wheel and floorboard. Some people may not like this. We'll see how it gets on in daily driving. If it gets to be too much I'll go back and cut the remaining lip off. Overall very satisfied, another no brainer for $40
Installation was much easier than expected. I did this mod on my old GTI and had to wrestle and beat it into place, but this just slid right in with a little white lithium grease. Put the car on ramps in the back and stands on the front, unbolted the crossmember and done.
Eibach Adjustable Sway Bars - These made a huge difference in the car's ability to hold a turn and obliterated the understeer I had. Currently set to the middle setting, although I may try to move it to full stiff. Combined with the LCA, it almost feels like a completely different car. Before I'd sometimes wonder if my car had too much power to be used safely and have fun in everyday driving - the front end seemed to wash out in harder cornering and wasn't confidence inspiring. This modification took care of that, and has given me much more confidence in the corners. The car really sticks now and feels solid all the way through.
The kit was very high quality. I was impressed with the machining of the end links and how well everything fit together. Installation was very straightforward and went easier than planned. The rear end was especially easy, took about 30 min. after having it in the air. The front is a little more involved and requires removing a plastic cover and metal support, but no big deal. Note to self, when fitting brackets that are still loose, don't work from directly underneath it. Had one of the brass fitting fall on my face from about 10 inches and open up a cut.
Shaftmaster one piece aluminum drive shaft - TBD
Overall very satisfied with all results so far and looking forward to getting the drive shaft in there. Would recommend each of these products to anyone looking into them.