Updated 3/27/2021 & 5/5/2022 - A look at the 2020 GT500 and exhaust system valves, Page 3
My thoughts on the “spring” would be that it acts as a shock absorber like you said, in the event that the valve binds up or is under pressure it protects the motor from those direct forces. Maybe even allow the motor to put some preload on the valve.
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Updated 3/27/2021 & 5/5/2022 - A look at the 2020 GT500 and
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