PURE Turbos Stage 2 Turbo Upgrade 2011-2018 BMW N55 335i 435i M2

The N55 single twin-scroll turbo in the 135i, 335i, 435i, M235i, M2, 535i, 640i and the X3 to X6 35i is what holds a tuned car back. PURE Stage 2 rebuilds that factory turbo around a larger billet compressor wheel and a high-flow turbine wheel while keeping the BMW housing, so it bolts in where the original was. PURE rates it at more than 550 wheel horsepower with fuel, supporting mods and a custom tune.

What PURE changes inside

PURE fits a billet compressor wheel and a high-flow turbine wheel sized for the N55, then upgrades the center housing rotating assembly (CHRA) to handle the higher shaft speed and boost. Every unit is balanced on a VSR high-speed balancer before it ships. The factory compressor and turbine housings are kept, so the turbo mounts in the factory location and works with the factory plumbing and heat shielding, with no cutting or fabrication.

How the core charge works

PURE builds this upgrade from a factory turbocharger core, so you choose how to supply one when you order:

• Send in your turbo first (no deposit): you ship your factory turbo to PURE, it is rebuilt to this spec and shipped back. You pay only the upgrade price.
• Pay a refundable core deposit: PURE ships a finished upgrade from stock right away. The deposit shown in the option name is added to the price, and it is refunded in full when PURE receives your old turbo in rebuildable condition within 60 days of delivery.

Before you ship a core, remove the oil lines, coolant lines, actuators and inlets. Cores that arrive damaged or incomplete may not get the full refund, so call us before you send one if you are unsure.

Choose the turbo type for your car, then the EWG or PWG core deposit to match its wastegate, or No to send in your own turbo. Optional silicone inlet pipe: the F-series version fits the M235i, 335i, 435i and M2, and the E-series version fits the 135i, 335i and 335is.

Pneumatic wastegate (PWG) cars: if you plan to run more than 25 psi of boost, PURE recommends switching to a pressure-based actuator.

Warranty and use

PURE backs its turbo upgrades with a limited 1-year, unlimited-mile warranty. A custom ECU tune is required, and the warranty assumes a qualified tuner and installer. This part is for off-road and competition use only and is not legal for street use in California or other states with similar emissions rules.

Features

• Billet compressor wheel for more airflow at the same shaft speed
• High-flow turbine wheel that reduces exhaust back pressure
• Upgraded CHRA, VSR balanced for durability at high boost
• Factory housing and mounting points, no fabrication
• Built for electronic (EWG) or pneumatic (PWG) wastegate cars
• Supports 550+ whp with fuel, supporting mods and tune

What's Included

One upgraded N55 turbocharger built on the factory housing, for the turbo type you choose, plus the inlet pipe if selected. Not included: gaskets, oil lines, coolant lines or the tune.

Specifications

Fitment notes

Fits the N55 single-turbo cars listed below, US model years. It does not fit the N54 twin-turbo cars, the 2016 and later 340i and 440i (B58) or the S55 M3 and M4. Pick the wastegate option that matches your car.

Fitment