Dinan High Flow Drop-in Replacement Air Filter - 2019-2026 BMW M240i/M340i/M440i/Z4 M40i & Toyota GR Supra

OVERVIEW

A direct-fit upgrade for the factory air box on the G-chassis B58 sedans and coupes, the Z4 M40i, and the Toyota GR Supra. The Dinan High Flow Drop-in Replacement Air Filter improves airflow over the restrictive stock paper element for better performance and efficiency — no cutting, no intake swap. Four layers of oiled cotton gauze flow better with less pressure drop than stock media, and the filter is washable and reusable, saving money over disposable replacements.

SPECS

• 4-layer oiled cotton gauze media
• Better flow / lower pressure drop than stock paper element
• Washable and reusable
• Direct drop-in — uses factory air box, no modification
• Compatible with stock air box: G20/G22/G23/G26/G29/G42/A90

PARTS INCLUDED

• 1x Dinan high-flow drop-in air filter

TECH RESOURCES

• Prefer a full intake? See our Carbon Fiber Cold Air Intake (M240i/M340i/M440i) or the PEX Cold Air Intake (G2x/G42)
• Supra / Z4 owners: see our Gloss Carbon Fiber Cold Air Intake (GR Supra & Z4)
• Drop-in filter — no installation document required.

PART NUMBER

• D401-0046

VEHICLE APPLICATIONS

The same air box is also shared with the B48 230i/330i/430i and Z4 30i; confirm exact model years against Dinan's application guide.