bmw n55 stage 3 turbo kit

Note: We also have a N55 External Wastegate kit, similar to our N54 kit. 

N55 External Wastegate Kit

bmw n55 stage 3 turbo kit

OEM reliability - OEM driveability

600whp. Full boost by 3000rpm. 

N55 EFR Kit prices start at $4,400. 

Kits are made to order.

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). 

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

intake components

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


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

factory fit & 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 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

Patent pending

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

included in the complete 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 2011-2015 335i.  

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.