Grimmspeed Stage 1 Power Package - 15-21 Subaru WRX- 191010 Green The GSS342 has an 11mm

The GSS342 has an 11mm inlet in line with the outlet

*Does NOT fit Civic Si or Type R or Hatchback

The GrimmSpeed Stage 1 Power Package is an excellent place to start when modifying your 2005-2009 Legacy GT

The 8-Channel K-Type EGT CAN Module can be daisy chained to a second module allowing users to receive up to 16 temperature channels through the same CAN bus connection

we saw typical peak and average gains of around 2-3hp with a much smoother power band

Grimmspeed Stage 1 Power Package - 15-21 Subaru WRX- 191010 Green The GSS342 has an 11mmThe beauty of the GrimmSpeed Staged Power Packages is that all of the included components were designed and tested to work well together as a complete system. Instead of piecing together parts from many different manufacturers and hoping that they're design theories are compatible, consider starting with one of our excellent Staged Power Packages based on your goals! The GrimmSpeed Stage 1 Power Package is an excellent place to start when modifying