Not trying to be a hater... But there is almost no point doing all of these works unless you are stripping down the interior and going with a lightweight racing seats (you can probably save a 100lbs just be switching the seats alone, going with a stripped down interior would probably net another 100-300lb saving, but why are doing that to a brand new $80k M3 is the question)...
Most of the weights in any modern BMW are in the sound insulation and stock seats. And unless you racing competitivelyp, it would be just a waste of money. If you want faster times, spend the money on sticker tires and better driving skills instead.
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09 BMW E92 335i: Top Mount EFR 7670 / Dinan / AP Racing / Wavetrac / TC Kline [Full Mod List]
07 BMW R1200S: Shine Yellow / Akrapovic / Ohlins
19 Volvo V90 T6: R-Design / Bowers & Wilkins / Polestar Optimization
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