Hi all, I just got the recently released Remark axleback system with mufflers on my 2023 IS350 RWD. It looks clean and I like the outside sound, but it drones a lot between 1500-2500 rpm. As a result, I try to either accelerate very gently in city driving, allowing it to shift below 1500 (I like the tame growl it has at this rev range), or keep it in sport mode and constantly be above 2500. The latter is almost necessary for highway driving as my average highway cruising speed of 72-75 mph equates to around 2100 rpm in 8th gear, where the drone is loudest. Sport mode will make the trans drop to 6th at this speed and raise revs to 2800+, where there is almost no drone.

I'm not the most experienced with setting up exhausts so does anyone know if changing the resonators will help? I've got the Apex-i resonated midpipe on preorder so ultimately I have the option to go with the full Apex-i catback setup which I've read has basically no drone. Would this kind of midpipe help with the Remark axleback though? Or should I try a different approach to either the resonators or axleback system entirely?

For reference here are links to the parts I've mentioned:
Remark axleback with mufflers
Apex-i resonated midpipe