BMW N55 Stage 3 turbo kit

We wanted to create the ultimate daily driver turbo kit.

OEM reliability. OEM driveability.

600whp. Full boost by 3000rpm. Kit prices starting at $4000. 

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BMW N55 STAGE 3 TURBO KIT

Kits are made to order.

Email jeff@speedtech.com to inquire about purchasing.


Cast Manifold

At the heart of the N55 kit is our ceramic coated cast manifold. Starting with a blank slate in CAD, we were able to design a manifold that will produce awesome spool, and big hp... all while keeping optimal reliability (no welded joints to fatigue crack over time). 

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PATENT PENDING

The unique configuration of the manifold, turbo, and integrated factory wastegate/linkage is USPTO patent pending.


BorgWarner EFR Turbo

BorgWarner’s EFR turbochargers set new world standards in performance, convenient installation and high-tech features:

  • Ultra low-mass Gamma-Ti turbine wheels

  • Mixed-flow turbine blade design

  • Dual ceramic ball bearing cartridges

  • Aluminum bearing housing

  • Stainless steel turbine housing

  • Flexible orientation compressor cover

  • Forged milled compressor wheels

  • Integrated high-flow wastegate, boost control solenoid valve, speed sensor and compressor recirculation valve


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Intake Components

In order to create the most efficient flow path into and out of the compressor, custom silicone couplers, combined with mandrel formed, powder coated, aluminum tubing is used.


Downpipe

Stainless steel downpipe, crafted with mandrel bends, tig welded flange and O2 bungs.


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Factory Fit and Finish

The kit was designed to not only make power, but also be efficient and reliable.  As such, we designed for it to interact with the stock components such as the airbox/filter/tube/intercooler/exhaust. With just our kit installed, and extra fueling, we've laid down 680whp... through the above stock components. Form and function living together... and making big power. 


Included In The Kit

  • BorgWarner EFR Turbo

  • Cast Exhaust Manifold (divided for twin scroll)

  • Stainless Steel Downpipe

  • RH Engine Mount

  • Waterpump Mount Bracket

  • Coolant Hoses and Fittings

  • Oil Lines and Fittings

  • Aluminum Turbo Inlet Tube

  • Aluminum Turbo Outlet Tube

  • Silicone Couplers

  • EWG Bracket and Linkage

  • Required Fasteners and Hose Clamps

  • V-band Clamp

Stage 3 kit for the 2012-2015 335i.  

Please note - kits are made to order - lead time is generally 4 to 6 weeks and depends on the availability of the BorgWarner EFR turbocharger(s).

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Dyno Notes:

- Vehicle configuration: 2014 335i. Speedtech Stage 3 Turbo. Speedtech Port Injection. Stock intercooler/airbox/airbox tube/air filter/exhaust.

- Boost set to 18psi at 3000rpm ramp to 25psi at 6000rpm

- 628whp, 539wtq

- Spool-up by 3000rpm

- Over 500 ft*lbs between 3800 to 6500rpm, over 450 ft*lbs between 3000 to 7000 rpm, providing great street performance.