Just wrapped up installing the front GX460 big brakes, as well as SOS Performance rear disc conversion kit using FJ Cruiser rotors and calipers. Installed on my 2006 Tundra DoubleCab 4x4. Non-VSC. I am absolutely BLOWN AWAY how well this thing stops now.
I was a bit nervous going for it given the mixed results folks have had, but it seemed like the ones having the most success are the later DoubleCabs with the non-VSC like I have. So I went for it. I also actually bought the replacement master cylinder from SOS, just in case, but I decided to do it at a later date if necessary, after doing the discs all around. I also left the stock rear LSPV in place with the same reasoning--swap it out later, if nessary. But this thing is stopping so well right now with just the GX460 fronts and FJC rears, I'll just be leaving it and running it for now.
Pedal feels absolutely awesome too. No excessive travel or anything. Brakes start to grab quick (but not too quick) and amount of travel feels awesome. Way better than before. Maybe is mostly the front GX460 stuff, but I cant really say for sure, but I absolutely HATE drum brakes. No.debate on "they just need to be adjusted properly" blah, blah. They're bullsh!t to work on regardless, and if they're so damn great, why the hell aren't they still on the fronts of every vehicle like in the old days? LOL. Ya, cause they suck. IMO, this is how the 1G Tundra should have been from the factory. --able to stop well.
Specific parts:
-OEM Toyota GX460 calipers, machined by Jim Smola (I think he does 3.5mm shaved off)
-Advics GX460 rotors and OEM pads
-SOS rear kit using centric pads and rotors and whatever calipers SOS sends
Overall, on the SOS kit, it seems like a decent kit, time will tell. One thing I am not stoked about, is that the calipers brake lines do not line up anywhere near the OEM hard lines on the axle. I had to bend them up and around in a terribly ugly loop. I'll def be replacing the hard lines with some new custom hard lines, asap.
