Before & After PPE 4” Exhaust On A GMC Sierra 1500 AT4 Duramax
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YouTubeShay Harambe
Before & After PPE 4” Exhaust On A GMC Sierra 1500 AT4 Duramax
Installing the PPE 4-inch exhaust on my 2021 GMC Sierra 1500 AT4 Duramax! This short captures the full before and after sound comparison using a decibel (dB) meter for real results. Louder, deeper, and cleaner tone — this PPE system really wakes the truck up. 🔥 PPE 4” Exhaust Install Before & After Sound Test Real DB Reading Results If ...
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