r/IMSARacing • u/Penguinho • 2d ago

Future Interest 'IMSA official' has urged Aston Martin/Heart of Racing to drop mufflers for "a more intense shriek" at Sebring

https://racer.com/2024/12/26/is-the-imsa-spec-aston-martin-valkyrie-gtp-about-to-get-louder/
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u/sickmemes48 Wheelen Action Express Racing Cadillac DPi #31 2d ago

I wonder if the muffler is used to decrease HP.

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u/Accomplished_Clue733 2d ago

Typically that's done through the engine mapping as it will vary race to race with the BOP.