do88 Carbon Intake System – BMW M240i / M340i (G42 / G20, B58)

OVERVIEW

On the B58 Gen 2 the airbox sits right next to the exhaust manifold, so the factory intake heat-soaks and the turbo ends up compressing hot, thin air. The do88 LF-240 is the M240i / M340i version of their sealed carbon intake: a fully enclosed carbon airbox with a heat shield toward the manifold and a second fresh-air feed so the sealed box isn't restricted by the single factory inlet.

The factory rubber intake hose and its two silencers are replaced by a smooth carbon tube that starts at 105 mm (4.1") and tapers into the turbo inlet, with do88's washable cotton-gauze filter on the end. do88 measured about 15 percent more airflow with the intake alone on their SuperFlow bench, and about 23 percent combined with their CNC-machined turbo inlet for the OE turbo, which has an 89 mm (3.5") connection. Three versions are offered: intake only, with the do88 inlet for the OE turbo, or with the inlet for the Pure 800 hybrid turbo. Expect noticeably more spool and induction sound.

SPECS

• Fully sealed carbon fiber airbox with heat shield and secondary air feed
• Carbon intake tube, 105 mm (4.1") at the filter, tapering to the turbo inlet
• do88 105 mm cotton-gauze filter, washable and reusable
• Optional CNC-machined do88 turbo inlet with 89 mm (3.5") connection, for OE or Pure 800 turbo
• Airflow (do88 SuperFlow SF1020): about 15 percent with the intake alone, about 23 percent with the do88 inlet for the OE turbo
• Removes the factory intake silencers for more turbo and induction sound
• UV- and heat-resistant high-gloss clearcoat
• Replaces OE 13718635100, 13718635102, 13718656983, 11618689501

PARTS INCLUDED

• do88 carbon fiber air filter housing and carbon fiber intake pipe
• do88 heat shield, bracket and air channel
• do88 air filter, silicone hose and rubber grommet
• EVAP joiner
• 5 × M5×12 screws, 2 × M4×10 screws, 4 × 4.2×9.5 Phillips screws with 4 screw clips
• 4 × hose clamps
• Turbo inlet versions also include: do88 CNC-machined turbo inlet (OE or Pure 800), turbo inlet joiner, 3 × M6×20 hex socket screws and 3 × M6 spring washers

TECH RESOURCES

• Required extras – turbo inlet versions: an ECU tune that disables the PCV (crankcase) heater. The do88 inlet has no heater element, so the factory connector is left unplugged and do88 recommends a custom tune to avoid a check engine light: Bootmod3 B58 Tune – BMW or MHD Super License – BMW B58.
• Required extras – Pure 800 version: a Pure 800 turbo: Pure Turbos PURE800 (NEW) – B58 Gen 2 or Pure Turbos PURE800 – B58 Gen 2.
• Required extras – intake-only version: none; it connects to the factory turbo inlet.
• Installation instructions (do88): LF-240 M240i / M340i intake installation instructions (PDF)
• Installation notes: remove the OE airbox, inlet pipe and EVAP hose. Mount the bracket and heat shield to the carbon housing, assemble the pipe, filter, grommet and air duct, then seat the housing tabs in the factory bushings. On turbo-inlet versions, swap the OE inlet for the do88 part (transfer the OE O-ring) before fitting the hose.
• Torque: hose clamps 5 Nm maximum — overtightening damages the carbon pipe.
• Filter care: clean about every 20,000 km (12,000 miles) with a cotton-gauze filter cleaner.
• No CARB EO is published for this part — off-road / competition use only in California.
• Price is for the item selected only; labor is not included.

PART NUMBER

• LF-240r — do88 Intake System, BMW M240i M340i G20 G42 (choose turbo inlet version above)

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