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Best exhaust mod for M2 M3 M4 owners
In this video, we show how a simple exhaust mod completely transforms the sound of a BMW M4 with the S55 engine. Using our ...
AUTOPOST on MSN
That knocking sound under your hood isn’t always fatal—and usually isn’t worth a $5,000 repair
A knocking sound from the engine often triggers worst-case assumptions, but piston slap is a far more common—and usually less dangerous—culprit. It occurs when a piston lightly contacts the cylinder ...
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