Product Information

Forge Alloy Charge Pipe for BMW N55 (RWD only)
M135i, M235i, 335i, [435i], M2 | Replaces OEM 13717604033

The factory plastic charge pipe is a known weak point on the N55. Heat cycling makes the coupler brittle, and in time it cracks and fails. When it goes, so does your boost. It’s one of the most common N55 problems we’re asked about.

Our replacement fixes it for good. The coupler and flanges are CNC-machined alloy, so there’s nothing to go brittle.

Fits (rear-wheel drive only)

• BMW M135i F20/F21 (2012-2016)
• BMW M235i F22/F23 (2014-2016)
• BMW 335i F30/F31 (2011-2015)
• [BMW 435i F32/F33/F36: confirm]
• BMW M2 F87 N55 (2015-2017). Not M2 Competition (S55).

Will not fit xDrive. On xDrive cars the steering rack sits where the pipe needs to go.

Why upgrade

• Alloy coupler and flanges won’t crack like the plastic original
• Quick-release CNC couplers make it easy to connect and disconnect
• Powder-coated hard pipes for a tough, long-lasting finish
• Built-in water/meth injection boss. Use it, or fit the supplied blanking plug
• Direct replacement for OEM part 13717604033

Before you fit

Keep your original O-rings and seals during removal — they’re reused on the Forge hoses.