From all the reading I did and buying two sets of callipers after getting the wrong ones.... Both 's12w' and 's12+8' have vented and non vented! (Found that out after buying a set of course)
Tommo has s12+8 stamped on his and I have s12w on mine.
I just sent you a pic via txt. Tommo and I are both running pulsar disks and yes there is a little bit of clearance work to get them Center to the pads

So I need s12+8 not s12w

Hilux S12+8 works well with U12 pintara discs (vented). need to redrill disc mounting holes to suit and grind the caliper. can fit inside 13' rims with a little grinding of caliper also

Put either of them on if you want to upgrade and make changes later!!!!
If you don't pick a vented 4 spot calliper (ie hilux/r32) and a disk. Then make it work. It's not as simple as bolt up and away you go for any vented disk so save your time and go for the ones that are proven!
Then build the car and drive it! It's that easy

In the pick the girlocks rotors top left look bigger than the 2 set UPS on the right. Are they all solid disks? Afaik the top right twin piston sumis were on 200b rotors too. And solid.

Your s12w 4 piston calipers are bottom right and should be vented rotor yeah? Cause I have solid rotor hilux ones with rotors same sizes as 200b rotors.

Personally s13 or s12w ftw. Even the hilux weren't enough for bob the builder in solid disks, so the vented hilux should disapate the heat better. S13 has a lot of pad choices too.

Tithe s12w callipers are hilux 4spots but I'm unsure of which disks to use as there are mixed comments on disk choice
I have 200b struts fitted to the car ATM so s13 stuff is not an option just yet, I'm having some struts shortened and Coilovers fitted but I'm unsure on what to run until I get the car on the track and test all the setup's and spring rates!
2013 will see my coupe on the track for testing and upgrades as needed and hope to have it all sorted by 2014 for a good year of racing

i cant help with hilux info but for me, the s13 setup although single piston worked really well on the track in my ute.
what are the s12w calipers? they look like twin piston? or are they 4 piston? maybe they'd work better again?

i think choosing vented disks over solids is the more important choice to make for a track car...
your braking performance will vary on caliper choice but no brake setups work well when they get too hot

An just trying to build setup a for other people's reference
I have many setup a but want to clear up what goes with what on easy setups

Il be selling a set of hilux calipers with honda legend discs soon ready to bolt on if your interested?

For track car I wouldn't bother with 200b calipers