Fi Exhaust Install- 2023 G63

May 12, 2025 | 01:41 PM

2023G63

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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!

May 13, 2025 | 07:09 AM

The Butcher

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Joined: Aug 2020

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G63, G65

Quote:

Originally Posted by 2023G63

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.

May 14, 2025 | 01:45 PM

EnigmaAW

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Joined: Jan 2009

Posts: 595

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From: Savannah, GA

2021 G63

The most accurate description on how to swap exhaust. Well done👍🏻👍🏻👍🏻

May 14, 2025 | 02:18 PM

2023G63

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Junior Member

Joined: Mar 2023

Posts: 43

Likes: 3

Mercedes G63 AMG

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

May 15, 2025 | 02:06 PM

ashishNJ

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Joined: Jan 2022

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Gl450

Once installed, please share some videos of different drive modes. Thanks

May 15, 2025 | 02:08 PM

2023G63

Thread Starter

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Joined: Mar 2023

Posts: 43

Likes: 3

Mercedes G63 AMG

Will do! Plan on getting it installed this weekend

May 16, 2025 | 07:57 AM

The Butcher

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Joined: Aug 2020

Posts: 781

Likes: 266

G63, G65

Quote:

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.