I had a lightweight crank pulley on my WRX and it made a very noticeable difference, both with throttle response and mpg. I'm hoping it would do the same with my GTS.
Anybody got one installed? Love to get some feedback.
2011 GTS manual
former life:
Tuned 2007 Subaru Forester XT auto
Tuned 2005 Subaru WRX manual