GrimmSpeed 02-07 WRX Top Mount Intercooler - Manual (Page 8)

Figure 13: Tighten clamps
11. Attach the 90 degree coupler to the y-pipe using the third 51-59mm clamp as
shown below. Not that the longer portion of the coupler is the end connected
to the y-pipe. Depending on your particular installation, you may find that
the angle and how far you push the coupler on need adjustment. We’ve made
the couplers extra-long to allow for maximum adjustability and even
trimming, if necessary.
Tighten t-bolt clamps