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The aFe MagnumFORCE Stage-2 Si Pro DRY S is a sealed cold-air intake for 2014-2016 BMW 4-Series cars with the 2.0L turbo N20 four-cylinder. It pairs a plastic intake tube with a sealed airbox and a 3-1/2-inch conical synthetic filter, and aFe claims 42% more flow, 10 hp and 14 lb-ft over the factory intake. No cutting or tuning is required, and the dry synthetic filter is cleaned rather than oiled. It is a modest bolt-on, not a big power adder, so expect the sound and throttle response to change more than the stopwatch.
Lowest price we've seen: $435.00 on Oct 31 at Black Ops Auto Works. Tracked across 1 store since Oct 31.
Owners of this intake generally rate it highly, with the 5-out-of-5 average from 8 ratings reflecting satisfaction with fit, sound and the sealed design. The recurring theme is a more audible turbo and slightly sharper throttle rather than a dramatic power jump.
