Our M18x1.5 to 1/8" NPT Adapter will allow the use of aftermarket temperature sensors that have 1/8" NPT threads. M18 ports are located on top of the Subaru EJ engines.

CNC Machined from solid billet Stainless Steel
M18 x 1.5 Male Threads
1/8" NPT Female Threads

Fitment:
Subaru Forester
04-08 Subaru Forester XT 2.5 EJ255 
09-13 Subaru Forester XT 2.5 EJ255 
Subaru Legacy
05-09 Subaru Legacy GT 2.5 Turbo EJ255 
10-12 Subaru Legacy GT 2.5 Turbo EJ255 
Subaru STI
04-07 Subaru Impreza WRX STI 2.5 Turbo EJ257
08-14 Subaru Impreza WRX STI 2.5 Turbo EJ257 
15-21 Subaru WRX STI 2.5 Turbo EJ257
Subaru WRX
02-05 Subaru Impreza WRX 2.0 Turbo EJ205 
06-07 Subaru Impreza WRX 2.5 Turbo EJ255
08-14 Subaru Impreza WRX 2.5 Turbo EJ255