cheapest way to get hp on a e46 bmw

[Bomtillington]

hey everyone i wanted to share some knowledge on extrahorsepower on a e46 325i the best thing to do is to get the ebay header dyno proven for almost 20 hp heres some videos of the engine noise before headers and the after headers sound will be posted after install

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[gstokes]

OFFICIAL: Guide to Horsepower Gaining Mods (Sorted by Bang for the Buck)! - E46Fanatics