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Inside Diamter for the MAF - 74.9mm
Outside Diameter of US Airbox with the lip for the air intake boot - 81.7mm
OD US airbox without lip - 81.5mm
approx inside diameter of silicone intake boot - 87.5mm
as per photos with a caliper
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E90 328xi 6MT | Intake Scoops | K&N + Charcoal Filter Delete | DIY Dinan 3in | 3.25in + 3.5in piping | N54 Manifold | MILVS | Ceramic Coated Headers | Secondary Cat Delete | Xdelete | 3.91 Diffs | 22RPD Tune
Last edited by chilledn52; 03-26-2025 at 04:21 PM..
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