What is the N55 known for?

Single twin-scroll turbo — simple, reliable. Strong response on a basic tune + intake + downpipe. Wide chassis coverage (1, 2, 3, 4 series + M2).

What is the recommended upgrade path for the N55?

A typical N55 build progresses through: Alloy charge pipe upgrade; Catless / high-flow downpipe; Cold-air intake + turbo inlet; Front-mount intercooler at the Stage 2 hardware pathway; Hybrid turbo hardware for 500whp+ builds.

Engine Platform

N55.

The N55 replaced the N54's twin-turbo setup with a single twin-scroll turbo. Less peak tuning ceiling than the B58 — but a cheaper entry point and excellent street-tune response in the 400–500whp range across M135i, M235i, M2, 335i and 435i.

Single twin-scroll turbo — simple, reliable
Strong response on a basic tune + intake + downpipe
Wide chassis coverage (1, 2, 3, 4 series + M2)

Upgrade Pathway

01Alloy charge pipe upgrade
02Catless / high-flow downpipe
03Cold-air intake + turbo inlet
04Front-mount intercooler at the Stage 2 hardware pathway
05Hybrid turbo hardware for 500whp+ builds

Chassis On This Platform

BMW M2 F87 BMW M135i E82 BMW M135i F20 BMW M140i F20 / F21 BMW M235i F22 BMW M240i F22 BMW M440i F32 / F36

Build Pathway

Catalogue · N55

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All Intakes All Turbo Inlets All Charge Pipes All Intercoolers All Heat Exchangers All Oil Coolers

N55 · Platform Notes

What is the N55 known for?: Single twin-scroll turbo — simple, reliable. Strong response on a basic tune + intake + downpipe. Wide chassis coverage (1, 2, 3, 4 series + M2).
What is the recommended upgrade path for the N55?: A typical N55 build progresses through: Alloy charge pipe upgrade; Catless / high-flow downpipe; Cold-air intake + turbo inlet; Front-mount intercooler at the Stage 2 hardware pathway; Hybrid turbo hardware for 500whp+ builds.