We have a replacement Skyline GTR 4wd pressure switch. Our switches are German made by Suco and have a custom pressure dialed in.
Our replacement switchs come in either a plug and play kit or as a sensor and plug kit.
Tips and tools for install
Remove the exhaust it will make your life way easier.
Use a 14mm crows foot with a 12 inch extension for removal of old switch.
If you doing the plug and pay kit then cut the oem pressure switch harness about 3 inches from the end.
If you are doing the wire in kit then you will want to cut the wiring right at the oem switch.
Use a 16mm crows foot with a 12 inch extension for install of the new unit.
Once the new switch is installed then you will need tk bleed the air out of the system using the oem sequence.