do88 Cold Air Intake System - BMW B46/B48 (G20/G21) 2018-2026

do88 Cold Air Intake System - BMW B46/B48 (G20/G21) 2018-2026

do88 SKU: DOBLF-250
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This is do88's fully sealed intake system for the B46 and B48 four cylinder in the G20 and G21. The factory airbox is replaced by a fully enclosed 7 inch airbox with a heat shield and a secondary air feed, which matters because the intake sits directly alongside the exhaust manifold and heat soaks quickly. In place of the stock intake hose do88 fit a 102mm (4 in) mandrel bent aluminium pipe joined by a custom silicone hose, and a large 105mm cotton gauze filter that is washable and reusable. do88 measure a 23% airflow increase over the factory intake. The filter ships without oil, so cotton filter oil is recommended for dusty conditions.

Specifications

Type Sealed cold air intake system
Filter Media Densely knitted cotton gauze, 105mm, washable and reusable, supplied unoiled
Intake Pipe 102mm (4 in) mandrel bent aluminium with custom silicone hose
Airbox Fully enclosed 7 in airbox with heat shield and secondary air feed
Airflow Increase 23% over OE
Quantity 1
OEM Replacement 13718580424, 13718580428, 13718656981
Part Number LF-250

Documents: Installation Instructions (PDF)

This part fits:

Year Make Model Submodel
2018 BMW 3 Series 320i / 320i xDrive / 330e / 330i / 330i xDrive (G20/G21)
2019 BMW 3 Series 320i / 320i xDrive / 330e / 330i / 330i xDrive (G20/G21)
2020 BMW 3 Series 320i / 320i xDrive / 330e / 330i / 330i xDrive (G20/G21)
2021 BMW 3 Series 320i / 320i xDrive / 330e / 330i / 330i xDrive (G20/G21)
2022 BMW 3 Series 320i / 320i xDrive / 330e / 330i / 330i xDrive (G20/G21)
2023 BMW 3 Series 320i / 320i xDrive / 330e / 330i / 330i xDrive (G20/G21)
2024 BMW 3 Series 320i / 320i xDrive / 330e / 330i / 330i xDrive (G20/G21)
2025 BMW 3 Series 320i / 320i xDrive / 330e / 330i / 330i xDrive (G20/G21)
2026 BMW 3 Series 320i / 320i xDrive / 330e / 330i / 330i xDrive (G20/G21)

Shipping

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  • Oversized items ship by freight and take longer.
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  • Backordered items ship as soon as stock lands. Lead times are manufacturer estimates and can change. Contact us for current ETAs.
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  • International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.

Returns

  • 30 days from delivery to request and ship back a return on new, uninstalled items in original packaging with all hardware.
  • Standard returns: 8% restocking fee on the item price before tax and shipping. Shipping is not refunded in either direction. All waived if the item is defective or we made the error.
  • Fitment guaranteed: select your vehicle above, or confirm fitment with us in writing before you order. If the part shows as a fit and it is wrong, the return is on us, even after installation. Otherwise, installed or used parts cannot be returned.
  • Final sale: special orders, coilovers, electronics, engine internals, turbochargers, superchargers and turbo kits, unless defective or we sent the wrong item.
  • Product images may be representative. The SKU and specifications in the listing are what ships.
  • Email us for return authorization before shipping anything back.

Full details: Shipping Policy · Returns & Refunds · Warranty
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