Another small update:
Installed ARP wheel studs in some new 5 lug front hubs. The current hubs are still good, but I wanted to install new bearings and such because the car will see a lot of abuse. This photo just shows the stock studs vs the ARPs.
A small disappointing note: ARP changed the coating on their wheel studs. It used to be a tough coating (I'm guessing CAD plating), but now they are cutting costs and use a thin high wear coating (probably a thin yellow zinc at best), which rubs up very easily. Sad to see the quality go down a bit. The stud itself is still great (I'd assume), but the coating is meh.
Another thing I ordered, but not installing for a bit, is my Radium top feed fuel rail kit with their fuel pulse damper. Over all it looks like a very nice product. A few things I wasn't very thrilled about though. The inner bore is one diameter for the inlet side for half of the fuel rail length. The other side is smaller. In my opinion, it would be better to have a constant inner diameter, at least until you pass all four fuel injector locations, then you could neck it down for the smaller return fitting. In their design, two injectors get one diameter, while two others get a smaller one. Only other downside is that whomever deburred the parts didn't do the best of jobs. Other than that, it's a very nice part, and well made. It also looks pretty awesome!
I bought this because when the S13's SR goes in, I will finally be going top feed injector with an E85 / Flex fuel tune.