Boost Solenoids

Pierburg 3 port Electronic Boost Control Solenoid (EBCS)

• Part Number 7.01024.02.0
• Connector: 2 pin Jetronic

easy to find as it's used on many OEM cars like BMWs and hence easy to source

MAC units are said to have sticking issues but some users on the [Subaru Discord] have mentioned to have had no issues with them

Injectors

Bosch 1000cc EV1

• Part Number 0 280 158 040
• Connector: 2 pin Jetronic

IAT

Bosch plastic housing IAT

The plastic housing IAT sensor is useful when installing an IAT sensor on a metal part (e.g. intercooler) to reduce heatsoak effects on the sensor.

• Part Number 0 280 130 085
• Connector: 2 pin Jetronic
• Datasheet
• Weld-on bungs
• MaxxECU
• Speeding Parts
• Probably fairly easy to DIY, from the datasheet it looks like a 12mm hole for the sensor and an M6 thread for a bolt that is like 15mm offset of the sensor hole