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Fi Exhaust Install- 2023 G63

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Old May 12, 2025 | 01:41 PM
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Mercedes G63 AMG
Fi Exhaust Install- 2023 G63

Hello,

I have a Fi exhaust on the way for my g63. I was wondering if anybody has installed it themselves rather than taking it to a shop. I have heard it is pretty straight forward but there aren't any instructions included so wanted to see if anybody has any guidance. 50/50 right now on if I want to install it or just let a shop do it.

Thanks for the help!
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Old May 13, 2025 | 07:09 AM
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Originally Posted by 2023G63
Hello,

I have a Fi exhaust on the way for my g63. I was wondering if anybody has installed it themselves rather than taking it to a shop. I have heard it is pretty straight forward but there aren't any instructions included so wanted to see if anybody has any guidance. 50/50 right now on if I want to install it or just let a shop do it.

Thanks for the help!
It's easy. One clamp at the front to release it from the secondary downpipes (that clamp requires a large star socket like the one pictured here), drop it down enough to unclip the wire from the actuator (might need a pick to get it to release), then slide the whole thing forward to get the rear hangers out of the rubber bushings on the frame side. Unbolt and swap the actuator over to the Fi system (I think it has to be clocked 90*, but there should be instructions in there that state that), and then reassemble. It helps to have a moving blanket to set the exhaust on when you lower it and when you are putting the new one on. Having another to person to help isn't 100% necessary, but will likely save you some frustration when you need a 3rd hand.

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Old May 14, 2025 | 01:45 PM
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The most accurate description on how to swap exhaust. Well done👍🏻👍🏻👍🏻
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Old May 14, 2025 | 02:18 PM
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Thank you for the response, really appreciate it!

Any guidance on how to install the tri-tips? do they just bolt onto the car or exhaust?

Thanks again
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Old May 15, 2025 | 02:06 PM
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Gl450
Hi

Once installed, please share some videos of different drive modes. Thanks
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Old May 15, 2025 | 02:08 PM
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Will do! Plan on getting it installed this weekend
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Old May 16, 2025 | 07:57 AM
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Originally Posted by 2023G63
Thank you for the response, really appreciate it!

Any guidance on how to install the tri-tips? do they just bolt onto the car or exhaust?

Thanks again
I've actually only done the quad tip installs so far, but from the looks of the Ultra edition tips that I've seen online they must bolt to the running boards or the body of the truck.
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Old May 22, 2025 | 12:17 PM
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Got the exhaust installed, ended up installing the catback itself at home but had to take it to a shop to install the black tri-tips because of the angle. Catback was fairly straight forward to install. So far it sounds great and no CEL so enjoying it. Louder than stock but not obnoxious. Highly recommend The Butcher if you are interested in getting one yourself, great customer service!
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Old May 22, 2025 | 01:40 PM
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Gl450
Thanks

Did the shop had to drill any holes to forge tips?
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Old May 22, 2025 | 02:31 PM
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No, no additional welding/wiring needed. The tips bolted into OEM holes
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