Stock, these come with a restrictive, stack-shaped intake muffler that tapers from 1 7/8 to about 3 inches. All i did was removing the muffler, the filter h….
BMW E39 5-Series Inline 6 Engine Air Filter Replacement DIY
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Stock, these come with a restrictive, stack-shaped intake muffler that tapers from 1 7/8 to about 3 inches. All i did was removing the muffler, the filter h….
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