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- GUN NOISES!! (Equivalent of Golf tee mod) - M3 and BMW M4 Forum
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- Golf tee mod / exhaust flapper disable w/ pictures - Page 12 - BMW Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E88 128i 130i 135i)
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- Golf Tee Mod | 3 DIY
- GUN NOISES!! (Equivalent of Golf tee mod) - M3 and BMW M4 Forum
- DIY: The Ultimate Tee Mod - BMW 1 Series Coupe Forum / Series Convertible Forum (1M / tii / 135i / 128i / Coupe Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
- 335i to: Golf Tee Mod + Cold start comparison - YouTube
- GUN NOISES!! (Equivalent of Golf tee mod) - M3 and BMW M4 Forum
- Update Killed Exhaust Sound? - New 2009 2010 BMW Z4 - ZPOST
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- DIY: 335i Sound Better, and even than golf tee mod. - BMW 3-Series (E90 E92) Forum