Thank you for the information! I was hoping to hear from someone with a similar setup to the one I'm considering. 93+ octane fuel should not be a problem anywhere I will be traveling, but I appreciate your bringing it up as a consideration. I don't think the exhaust mod you made would pass muster here.We sound similar. I'm running ICON Stg 4 suspension front and rear with the TRD supercharger on a 2012 4wd 6spd truck. Supercharger is great if you have access to 93+ octane fuel, which is all I've been running in any of our vehicles anyway, and is readily available now nearly everywhere (yes, even East Africa) - I know, there are still places without 93+, but many fewer than 10 years ago. Cost of the supercharger is reasonable, in my view, when you look at the fact that it's now been proven over the course of a decade that the 1GR-FE can take the extra stress.
I put a smaller muffler on and ran a side outlet exhaust, I didn't see the point of having an exhaust pipe go up and over the rear axle just to exit. I really like the fact that this cut a bunch of weight and potential for a long exhaust system to bounce around on a truck that is mostly used off-road. The system is no louder than stock, which is also nice.