KC Whistler Stage 3 Turbo (300871) for 2011-2019 Powerstroke 6.7L

KC Whistler Stage 3 Turbo (300871) for 2011–2019 Powerstroke 6.7L

High-Flow Turbo Built for Aggressive 6.7L Powerstroke Performance

The KC Whistler Stage 3 Turbo (300871) delivers maximum airflow for performance-driven 6.7L Powerstroke builds. KC Turbos designed this unit for hot street driving and high-RPM racing, not towing. Because it moves more air than any other turbo in the Whistler lineup, it supports aggressive power goals when paired with the right fueling and tuning. As a result, drivers gain strong top-end performance and a distinct turbo sound.

Large Compressor and Turbine for Maximum Airflow

KC equips the Stage 3 with a ported KC compressor cover and an upgraded 68mm billet compressor wheel. On the turbine side, the turbo uses the largest 10-blade high-flow turbine wheel in the Whistler series. Consequently, the turbo sustains airflow at higher RPM where smaller units fall off. At the same time, this configuration produces the iconic 2003-style turbo whistle that many enthusiasts seek.

Intended Use and Performance Focus

This turbo is best suited for performance-driven trucks that see spirited street use or competitive racing. Because it prioritizes airflow and RPM over low-end efficiency, towing is not recommended. However, for drivers looking for occasional towing capability with strong performance gains, the KC Whistler Stage 2. is a better alternative. The Stage 3 is built for drivers who want maximum output and are prepared to support it properly.

Fuel System and Tuning Requirements

To unlock the full potential of the KC Whistler Stage 3 Turbo, your truck must have a healthy CP4 or an upgraded fueling system. Additionally, you must run updated tuning to support the increased airflow. Without proper fueling and calibrations, the turbo cannot perform as designed. Because of this, KC requires owners to address fueling and tuning before operation.

Fitment Notes and Installation Requirements

• 2015–2019 Powerstroke 6.7L: Direct-fit installation

• 2015–2016 Powerstroke 6.7L: Requires a pedestal conversion kit

• 2011–2014 Powerstroke 6.7L: Requires a retrofit kit and is not a direct drop-in

Selecting the correct supporting hardware based on model year is critical for proper installation and operation.

Built for Drivers Who Want Maximum Output

Ultimately, the KC Whistler Stage 3 Turbo (300871) targets enthusiasts who want top-end power, aggressive sound, and high-RPM performance. When you pair it with the correct fueling, tuning, and supporting components, this turbo delivers the highest airflow KC offers in the Whistler lineup.