Burger Motorsports 4-port MAC low-frequency boost control solenoid for retrofitting a single-turbo kit to the BMW N54, N55 or B58. Plug-and-play harness connector for no-splice installation; the extra ports over the 3-port version support additional boost-control plumbing configurations used in some single-turbo setups.

Fitment: BMW N54/N55/B58 single-turbo-kit builds - E90/E92 335i, F30 335i/340i, F32/F33 435i/440i (confirm exact single-turbo kit compatibility at checkout).