Muffler Delete Limp mode 2020 GT63s 4door
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Joined: Jul 2025
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gt63s
Muffler Delete Limp mode 2020 GT63s 4door
Any input appreciated, I desperately need help!
Basically I cut my mufflers off my 4 door 2020 Gt63s and the car went into limp. Was super confused but did some research and figured out its limp because the valves went with the muffler during the delete, however the shop I did the delete with did zip tie them up and keep them plugged in. I assume its limp because the metal bracket oh the muffler that the motor was attatched into was cut out so the springs on the motor had to get taken out. Motor isnt getting any actuation or feedback so its making my car limp.
Later got the AWE valve simulator plugs, put them in instead of the oem motors and the car is still limp. Anyone have any ideas or fixes? I have CPO warranty and don’t want to void it via coding ecu etc.
A shop I know said they can code it out via the CPC module but that would void my CPO surely.
Need any advice please! Car has been limp for a while now unfortunately.
Basically I cut my mufflers off my 4 door 2020 Gt63s and the car went into limp. Was super confused but did some research and figured out its limp because the valves went with the muffler during the delete, however the shop I did the delete with did zip tie them up and keep them plugged in. I assume its limp because the metal bracket oh the muffler that the motor was attatched into was cut out so the springs on the motor had to get taken out. Motor isnt getting any actuation or feedback so its making my car limp.
Later got the AWE valve simulator plugs, put them in instead of the oem motors and the car is still limp. Anyone have any ideas or fixes? I have CPO warranty and don’t want to void it via coding ecu etc.
A shop I know said they can code it out via the CPC module but that would void my CPO surely.
Need any advice please! Car has been limp for a while now unfortunately.
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Joined: Dec 2024
Posts: 7
Likes: 2
Find upgraded mufflers that have the flapper valve that directly bolts on to the gt63 and reinstall. Have the code clear for the limp mode. They have upgraded mufflers for better sound quality. RENNTech has a set but there going to cost.
Last edited by Gt53; Aug 25, 2025 at 06:18 PM.
