Hmm that was unfair. I was transferring the frustration involved in making car parts that works. A spacer that doesn't swells + a hub centric feature that doesn't dance up & down with the weather is pretty damn hard to make, cost a wheety lots of dosh also :/ Called 'performance' car parts...
If it would be me, I'd stick with your -1mm H&R's. They are indeed treated 7075 and works. Cost a bit though lollll
At the end of the day, whether 6061, 7075 (whatever), as long as you use good joints that can deal with the energy xfer caused by TE, you'll be just fine for both street and track. Talking about those two-piece bolts:
and avoid those below at all cost. Won't work on the track at >60dC, you'll seriously compromise the wheel. Scout promise!
