Vargas N55 Stage 1 JB Upgrade Kit (NEW)

The Vargas VTT N55 Stage 1 JB Turbo Upgrade Kit is engineered for BMW N55 owners seeking a reliable power increase while maintaining factory drivability and spool characteristics. Designed as a direct replacement for the stock turbocharger, this upgrade delivers an increase of 40–75 wheel horsepower while retaining OEM-style response and smooth power delivery throughout the rev range.

This turbocharger features a VTT custom reverse billet compressor wheel paired with a brand-new stock turbine. The optimized compressor design increases airflow efficiency while preserving the stock turbine’s fast spool behavior, allowing consistent power delivery all the way to redline. With proper fueling, supporting modifications, and professional tuning, this turbo is capable of supporting up to 425 wheel horsepower.

The Stage 1 JB upgrade remains fully compatible with the factory plastic diverter valve, making it an ideal option for a simple and discreet upgrade. Optional diverter valve upgrades are available for improved reliability, as factory components are known to degrade over time. Installation is completely bolt-on with no required modifications to oil or coolant lines, making the upgrade dealership-friendly and visually indistinguishable from stock.

There is no core charge required, and each turbocharger is built new from the ground up. For best results, an optional installation kit is recommended to ensure proper hardware replacement during installation. Every VTT turbocharger includes a one-year limited warranty for added peace of mind.

Key Features

Supports 40–75 WHP increase over stock
Capable of up to 425 WHP with proper fueling and tuning
VTT custom reverse billet compressor wheel
Brand-new stock turbine for OEM spool characteristics
Optimized airflow through redline
Direct bolt-on installation
No oil or coolant line modifications required
No core charge
One-year limited warranty

Installation Notes

Turbocharger installation only
Additional labor required for optional components such as inlets or fuel system upgrades
Vehicle year must be specified due to post-2013 changes

Fitment

BMW vehicles equipped with the N55 engine

Compatible across multiple BMW chassis platforms using the N55 turbocharged engine. Vehicle year specification is required to ensure proper configuration.

Production & Order Policy

Turbochargers are built to order
Typical build time is 2–4 weeks
Once built, units ship within 2 business days
Cancellations prior to production may incur a fee
Built or custom-configured turbochargers are subject to restocking fees except in warranty or defect cases