10K Mile Update on the Motortech spacers:
No significant problems to report... yet. When I swap my tires (i.e. replace due to wear) every 10K miles, I check the spacers. I live in Southern LA (not L.A.), so no snow or salt. I noticed a couple of my spacer bolt head are looking puny...
I'm not sure how far this oxidation will go, but hopefully not to a part failure point. I'll be watching it. I'm also not sure what all the "goober" is on the surface. I clean it with Simple Green, but it keeps returning.
People have asked about fender rubbing. With the factory Michelin Pilot Super Sports in 21", they rub very slightly on a near full lock steer in both directions...
I'm still running the Michelin's in front. I've replaced the rear with Falken's this go-round and have noticed they have a slightly taller profile despite being the exact same 265/35R21 (about 3.65 inches tall) measurement. I know this because there is a specific spot (spots) on I-10 between Lafayette and Baton Rouge, that I frequent, that cause the car to "bottom out" the suspension at 70 mph. With the Michelin's in the rear, and the suspension on auto-lowering at 70 mph, those areas were never a problem. With the Falken's, they are a consistent problem. In my years as a "car guy", I know different tire manufacturers can have different profiles (rounded vs. squared) despite a consistent sidewall measurement.
As an additional note, people have voiced concern (myself included) about the metal quality of the Motortech supplied lug nuts. Here is a comparison....
Yes, I used the proper size socket on the nuts. Part of the problem is the depth of the nut and the flange close to the collar. There just isn't enough nut to grab. I torque to 130 specifically, so it isn't because of attempting to over torque.