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I would honestly doubt the CEL is bacause of too much air. I personally run a BMS Intake on my 230xi (same engine series but 4 cylinder) without any issue with the weather up here in canada (and never got a CEL last winter with temperature down to -25f). And with looking at pictures from the Momentum intake it seem there is more restriction than the BMW,
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08 FG2 Civic SI FBO - SOLD
09 E92 335i Xdrive FBO - SOLD
17 F22 230i Xdrive | Alpine White | Coral Red | M-Sport | BMS Intake | JB4 | 666M Rep | M Carbon Mirrors | Roof Rack | Daily Driven  |