Several people have asked about the quality of the Gates timing belt kit. I've just installed this kit, and would like to offer my impressions.
First, thank you to:
EJ257, azWRX06 and TOrque for helping me when I was trying to source parts.
Trainrex and Donkey for their advice and help with the camshaft and crank seals. The sprockets would still be on the car without their advice.
The Gates kit is available from various vendors and from what I can work out, there is more than one "kit" even for the same year and model. Some kits come with the water pump, others do not; I opted for one with the water pump.
The kit arrived in a small box marked Gates with the kit part number. The box gives the origin for the major components. My kit contained a mix of components from JP, CN, and KR. The water pump initially worried me, as I saw green residue on the inside of the housing. I contacted Gates, who responded very quickly and efficiently (thanks guys!) that the residue is generated from attaching the three outlets. This makes sense, as is seemed to "stream" from the outlets that supply coolant to the oil cooler. The pump differed from the existing pump, installed by the dealer under warranty about four years ago, in that the impeller blades are "open" and not "housed" like on the old pump. The new pump's impeller looked like a prop; the old pump's impeller looked like the Honda VF500F's inboard ventilated front discs.
The rollers and the toothed gear looked very similar; some were marked "Koyo" but I don't know if it's the same firm from which I've gotten a radiator to replace the horrific Calsonics that Subaru supplied twice (that failed twice...). One of the rollers had a "shallower" mount point, meaning the mounting bolt went into the motor about 1 mm more. Not an issue in my case.
I am quite picky when it comes to parts. I am not an expert and my mechanical skills are rudimentary, but for what it's worth, the Gates kit IMO is very good and is quite OEM in quality. Incidentally, while removing the accessory belts, that were bought from a dealer, I noticed that one of them was marked Gates also.
Having examined and installed the parts, I have no misgivings at this point. However, there is one exception; one part in the kit was nowhere near the quality of the rest, and in fact let the side down, so to speak: the water pump gasket. The Gates-supplied water pump gasket is IMO a bad choice. It's a shame, since the rest of the kit is very good. Buy the dealer's "Subaru" water pump and thermostat gaskets instead.
Other than that IMO the Gates kit is a good value and -- I'm hoping -- will prove a good, reliable choice.
Thanks again to all who helped me.