While I hunt for the S5 Rotors to complete the set I have and put tires on them. I decided I would go ahead and try out the ECS spacer kits they were offering. I got this during the sale they had going which had them priced at around $160. This included the extended wheel bolts. The aggressive kit included a set of 10mm spacers for the front and 12.5mm spacers for the rear. Most folks have noted the rear needed just a few more mm to be flush. Once I got the spacers in everything seemed to check out. I did notice the extended hubs were not anodized completely all around. This was not a big deal as it was on a part which would not be seen, something to mentioned about the QC I guess. Install was simple I ordered an OEM wheel hanger tool from Porsche, such an awesome tool and well worth the price. The wheel hanger tools on amazon and other sites all seemed flimsy and had knurling which is not ideal for the application. Not the mention the OEM tool was cheaper than almost all the other aftermarket options.... Install was straightforward no issues there.
On to the first the aggressive kit rubs pretty bad in the back. Currently I am running at 25 3/4 FTG in the front and 26 1/8 FTG in the rear. Even alone in the car the rear would rub on aggressive cornering and mild dips in the road. I do have Michelin AS3+ on my wheels right now which are known to have a more vertical side wall. The front in perfectly fine. I have not had any issues up front at all. Next issue I had is the vibration right when you hit 60mph. Hard to describe as it is not per say a vibration it is more of a wobble even. Once past 70mph it stabilizes. I have tried many different things and many different ways of doing the final torquing and all have yielded the same result. I spoke with my buddy James (@solarsuplex) He has ran spacers and has some a lot of experience with running H&R spacers and has never had said issue. I am worried it may have something to do with the actual spacers. There are a few threads running around where guys have measure the run out in ECS spacers and they were thinner in spots and thicker in others. I will look into this some more.
In the meantime the 12.5mm spacer had to be replaced so I ordered another 10mm set for the rear before our road trip down to Cape Kiwanda at the end of February. I installed the 10mm spacers and I still had rubbing in the rear on larger dips now and aggressive cornering. Albeit it this was with a trunk full of our luggage and a full tank. The roads down in Oregon and through the mountains were not amazing at all so that did not help. I still have the spacers on as it just looks to good even with all the downsides. The man rubbing is occurring where the fender liner bends and goes up into the wheel well and the notorious nipple of where the rear fender ends and rear bumper starts. I may grind this area down as it just seems to be seam sealer and not metal plus this would be good in getting ready to mount the S5 wheels.
All in all the spacers are okay. I am not completely happy at all and will look further into why the wobble occurs. I am looking to purchase a digital caliper maybe and see what the exact numbers look like around the actual surface of the spacer. I will be reaching out to ECS as well. The majority of their troubleshooting help I saw in the threads was about torquing the bolts in the air, which did not help at all. I will add I have had some bad luck with a few of the in house ECS items I have recently purchased.
10mm front and back in the photo below. I will add more photos from different angles.
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