do88 Charge Pipe – B48 / B46 2.0L (BMW 230i / 330i / 430i, GR Supra 2.0, Z4 30i)

OVERVIEW

The B46/B48 2.0L turbo four uses the same plastic charge pipe design as the B58, and it cracks the same way — usually under boost, and often on tuned cars. The do88 TR-400 replaces it with a two-piece aluminum pipe, 76 mm (3") and 60 mm (2⅜"), mandrel-bent and joined with an aramid-reinforced silicone hose that takes up thermal movement.

do88 rates it at about 12 percent more flow than OEM — 558 CFM against 500 CFM. It fits the B46/B48 F-series 230i, 330i and 430i, the G20 330i and 330e, the Z4 G29 30i and the Toyota GR Supra 2.0, along with other markets' 2.0L models. It is only for cars with the water-cooled intercooler (charge cooler in the intake manifold).

SPECS

• 76 mm and 60 mm mandrel-bent aluminum pipes, black powder coat
• CNC-machined throttle body and turbo connections
• Aramid-reinforced silicone joining hose
• Flow: 558 CFM vs 500 CFM OEM — about 12 percent more (do88 testing)
• For B46/B48 cars with a water-cooled intercooler only
• Replaces OE 13718601683

PARTS INCLUDED

• 2 × do88 charge pipes
• 1 × do88 silicone joining hose
• 2 × hose clamps
• 1 × M6 screw

TECH RESOURCES

• Required extras: none — the OE sealing ring, clip and sensor transfer to the do88 pipe. Confirm your car has the water-cooled intercooler before ordering.
• Installation instructions (do88): TR-400 B48 charge pipe installation instructions (PDF)
• Installation notes: remove the engine cover, airbox and OE charge pipe, fit the lower pipe to the turbo outlet with the OE seal and clip, join with the silicone hose, fit the upper pipe to the throttle body and transfer the sensor.
• Torque: hose clamps 5 Nm.
• 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

• TR-400 — do88 Charge Pipe, B48 2.0L

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