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| 07-14-2024, 05:01 PM | #1 |
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E60 523i Engine Upgrades
Hello! I recently got a 523i. What would be some nice engine upgrades to begin with to gain some HP. I’ve no clue what to start with. Maybe i will buy a cold air intake filter one of these days, but when i do… Does some other parts need to get replaced aswell?
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