do88 Intake System – BMW M240i / 340i / 440i (F22 / F30 / F32, B58 Gen 1)

OVERVIEW

The do88 LF-260 replaces the plastic airbox and intake pipe on the B58 Gen 1 M240i, 340i and 440i with a fully sealed heat-shielded filter enclosure and an aluminum intake pipe. The enclosure uses a lid and sealing strips so the filter only breathes through the factory fresh-air duct, which keeps intake air temperatures low.

The pipe is 85 mm at the MAF sensor and expands to 93 mm toward the turbo inlet elbow. do88 deliberately kept the MAF section at 85 mm so the factory air-mass readings stay accurate — they note that 89 mm pipes from some other kits can read wrong, run lean and set a check engine light. do88 rates it at up to 39 percent more airflow than stock and measured a 0.4-second quicker 100–200 km/h run on a Stage 2 car. With the factory silencer gone you'll hear more of the turbo and diverter valve.

SPECS

• Fully sealed heat shield with lid and sealing strips; reuses the OE fresh-air inlet duct
• Aluminum intake pipe: 85 mm at the MAF sensor, expanding to 93 mm
• do88 85 mm (3.3") cotton-gauze filter, washable and reusable (ships dry)
• Airflow: up to 39 percent over stock (do88 testing)
• 0.4 s quicker 100–200 km/h on a Stage 2 car (do88 testing)
• Removes the factory intake silencer
• Replaces OE 13718601678, 13718605164, 13718601682

PARTS INCLUDED

• do88 heat shield and heat shield lid
• do88 intake pipe and silicone coupler
• do88 air filter
• 2 × rubber sealing strips and 1 × foam strip
• 3 × hose clamps, 5 × screws, bolt, nut and washer

TECH RESOURCES

• Required extras: none. The filter ships dry — apply cotton filter oil if you drive in dusty conditions.
• Installation instructions (do88): LF-260 B58 Gen 1 intake installation instructions (PDF)
• Installation notes: disconnect the air mass meter, loosen the hose clamp, remove the screws and snap lock, and lift out the OE airbox and hose. Move the air mass meter to the do88 pipe (it may need drilling to accept the supplied screws), fit the pipe with the silicone coupler, mount the heat shield, fit the sealing strip to the lid and clamp on the filter.
• Filter care: clean about every 10,000 km (6,000 miles) with a cotton-gauze filter cleaner; oil evenly and sparingly. Replacement element: do88 LF-260-FILTER.
• Tuning: no tune is required. Pairs with the Bootmod3 B58 Tune – BMW and MHD Super License – BMW B58.
• No CARB EO is published for this part — off-road / competition use only in California.
• Price is for the item only; labor is not included.

PART NUMBER

• LF-260 — do88 Intake System, BMW M140i M240i 340i 440i F3X

VEHICLE APPLICATIONS