Dinan High Flow Drop-In Air Filter - BMW 330i / M340i / Toyota GR Supra 2019-2026

Factory paper media filters well but restricts flow, and it is a consumable that gets binned at every service. Dinan's drop-in replacement uses four layers of oiled cotton gauze, which passes more air at a lower pressure drop, so the engine spends less effort pulling air through the filter to make the same power or more. Because the media is cotton rather than paper it washes and re-oils instead of being thrown away, which takes the air filter out of the running maintenance cost for the life of the engine while still filtering properly. It drops straight into the factory airbox with no other changes.

Specifications

This part fits:

Shipping

• In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
• Standard, expedited, and overnight options at checkout.
• Oversized items ship by freight and take longer.
• Backordered items ship as soon as stock lands — contact us for lead times.
• 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-day returns on new, uninstalled items in original packaging with all hardware.
• Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
• Installed or used parts can’t be returned — confirm fitment before you install.
• Special orders and custom items are final sale.
• Email us for return authorization before shipping anything back.

Full details: Shipping Policy · Refund Policy