Hello all, after doing some research, I realized Fuse 15 can be removed on 2021+ models to increase the exhaust volume. My question is, are there not any electrical concerns with permanently removing the Fuse 15? Is it safe to leave a fuse socket empty permanently?

 

Pull it. Leave it. No worries.

 

Thanks I just did. Lower RPMs finally came alive, love the sound. I wonder if this might cause any damage to the stock cats or the vacuum system in the long term.

 

It won't. The exhaust valves are right by the muffler (you can see them if you crawl underneath) so they are at the tail end of the exhaust system, well aft of the cats. Likewise, the system uses vacuum to close the valves. Without vacuum they are 100% open. By pulling the fuse, you are just shutting off the vacuum to the valves so they always stay open. It's actually less wear and tear on the valves and the vacuum system. The only argument might be that left open for long periods of time could cause the valve mechanism to freeze/get stuck in the open position from lack of use in the elements, but that's what you have now anyway so win/win!

 

How can you do this on 2014-2020 models?

 

Early models had fuse 43 to open the valves, later ones (MY18 on?) use fuse 15.

 

Fuse 15 on the 20R model as well.