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To those that added sound deadening sheets, do I need to cover the whole inside panel, etc.... or can i just apply like 4 sq.ft of it on the panel behind the speaker? How much coverage for a minimal install.
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2018 BMW M2 LCI BM3 Stage 2 + MPE + FTP charge pipe + MST V2 Inlet + TurboSmart DV + CSF FMIC + AA Hi-flow Downpipe + Turner Rear Shifter Bushing + Wiechers Strut Brace + Bilstein B16 PSS10 + Apex VS-5RS
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