Next up was the exhaust. I have early starts (4.30AM) and live in a relatively quiet neighbourhood so goal here was to have something that had a nice tone but didn't lower eyebrows.
I opted to try out an STi system since these OEM exhausts are a dime-a-dozen on Facebook marketplace here in NZ:
Of course, the rear STi tips would not fit under the factory bumper (and important to note here: they also don't extend out anywhere near as far as the single-tip Levorg one does).
Cue the "Quattlo Muffler Garnish" from Shining Speed Japan and a bit of work with the angle grinder and dremel:
Now, these garnishes are originally designed to go together with a "single to dual", sleeved exhaust tip conversion which is unfortunately discontinued and I was wanting to use the STi tips anyway for the extra sound, so end result meant that the tips sit a little inside the rear bumper since the OEM tips are non-adjustable.
I also scored a genuine STi Levorg rear diffuser so that went on at same time:
Back under we go with the angle grinder:
The chrome tips come off nicely, as they are only spot welded in a couple of places, leaving a metal sleeve which will later house a clamp-on style exhaust tip (4x) from AliExpress:
I took sound clips with a few variations of the exhaust :
- OEM Levorg midpipe / Levorg tailpipes (The levorg as we all know it, quiet)
- STi midpipe / Levorg tailpipes (Extremely mild increase in exhaust note, barely noticable)
- STi midpipe / STi tailpipes (Marginal increase in sound, however brings a very annoying "booming" drone from 1,200-1,500 RPM with the CVT transmission, purely because the pipes sit right under the rear bumper (EDIT: Confirmed after removing stock tip garnishes and replacing with longer ones above: 30/11/23)
I believe the drone is partly to do with the fact the tail pipes are currently 50-60mm short of where they should ideally be on the bumper.
But also the rear sound-deadening in the Levorg is awful. A trip to Jaycar saw me with some butyl, foam and mass loaded vinyl to help reduce some of this drone coming into the cabin. A work-in-progress pic:
This is currently where I've left things. The two side, flat panels just with butyl have helped TREMENDOUSLY. If you remove your rear trim and give these a tap (I have a video of mine) you will notice how these sound like the side of a tin shed. Why Subaru left these un-deadened is beyond me.
I will get back in soon and update this post with the foam added and finally the mass-loaded vinyl over top.
Of course, once the exhaust tips arrive from AliExpress and move the exit back another 50mm, this will also help.