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How to get more whistle
2007.5 Duramax Hi I have a 2007.5 Duramax LMM and i want to add easy power and a louder whistle. I have a Edge Tuner on now, but other than that, it is stock. I live in California and we have tons of laws prohibiting EFI Live, Straight Pipe, Filter Deletes, and much more. Is there...- JJO 2007.5 LMM
- Post #45
- Forum: Duramax Hard Parts