They're a replacement bleed nipple with a one way valve in them.
As long as you use a hose on the nipple no air can get back in. So there's no need to close the nipple until its bled.
http://www.speedbleeder.com .
Not sure of the exact part numbers but phildo has mentioned it a few times.
Lol I'm with you stripes. I'm on my 5th vivosmart. Can't complain though rebel had to give me $70 credit with the last one thanks to their system farking up.
The diff will turn upwards when it tramps. If you don't have any tramp now I wouldn't bother until you get the new motor in. As others have said mals kit is the best in terms of keeping ground clearance.
Easy option is to sell and buy a turbo, will be a lot cheaper to. Motor, gearbox/trans, driveshaft and diff's are different. Not to mention engine looms, sensors etc. Use the search box and you will find a lot of threads with info on this.
Tig does some great gear. Bov is up to you, vented isn't legal and plumb back is, dual port is best of both worlds and has blanking caps available so legal is possible.
Pulled out the solid engine and trans mounts, fitted genuine mounts. So much better, forgot how quiet these cars are in the cab with factory mounts. Changed all the radiator hoses and swapped back to 98 from ethanol ready for the holiday trip.