PURE Turbos Stage 2+ Turbo Upgrade 2015-2021 BMW S55 M3 M4 M2

PURE Stage 2+ is the top upgrade for the S55 in the F80 M3, F82 and F83 M4 and the M2 Competition and CS. PURE rebuilds both factory turbos around larger billet compressor wheels and high-flow turbine wheels while keeping the BMW housings, and adds a billet front inlet snout, a Hi-Flow rear inlet snout and a silicone front intake inlet. With ethanol, supporting mods and a custom tune, PURE rates it at more than 900 wheel horsepower. Price is for the pair.

What PURE changes inside

PURE fits a billet compressor wheel and a high-flow turbine wheel sized for the S55, 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 turbos mount in the factory location and work 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 turbos first (no deposit): you ship your factory turbos to PURE, they are 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 turbos 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.

Boost note from PURE: running more than 35 psi on this platform is not recommended.

An S55 install kit is offered as an option at checkout.

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 housings and mounting points, no fabrication
• Machined billet inlet snout (front) and Hi-Flow inlet snout (rear) included
• Silicone intake inlet (front) included
• Supports 900+ whp with fuel, supporting mods and tune
• Price covers both turbos

What's Included

Both upgraded S55 turbochargers built on the factory housings; billet front inlet snout; Hi-Flow rear inlet snout; silicone front intake inlet. Not included: gaskets, oil lines, coolant lines or the tune.

Specifications

Fitment notes

Fits the S55 cars listed below, US model years: the F80 M3, F82 and F83 M4, and the M2 Competition and M2 CS. It does not fit the 2016-2018 M2 with the N55 or the G-chassis S58 cars. Removing or modifying the factory turbo heat shields may be needed for fitment.

Fitment