KC Whistler Stage 2 Turbo (300870) for 2011-2019 Powerstroke 6.7L

KC Whistler Stage 2 Turbo (300870) for 2011–2019 Powerstroke 6.7L

Balanced Performance Turbo for Street and Light Towing Use

The KC Whistler Stage 2 Turbo (300870) delivers a strong balance of performance, drivability, and sound for 6.7L Powerstroke owners. KC designed this turbo for drivers who want more airflow than the Stage 1 without stepping into full race-oriented territory. As a result, the Stage 2 works well for daily driving, hot street use, and occasional light towing. At the same time, it maintains smooth power delivery and reliability when properly supported.

Upgraded Compressor and Turbine Design

KC equips the Stage 2 with a ported KC compressor cover and an upgraded 64mm billet compressor wheel. On the turbine side, the turbo uses a larger 10-blade high-flow turbine wheel compared to the Stage 1. Because of this combination, airflow increases while spool characteristics remain street-friendly. Additionally, this setup produces the signature 2003-style turbo whistle that many Powerstroke enthusiasts prefer.

Ideal Step Up from the Stage 1 Turbo

Compared to the Stage 1, the Stage 2 offers noticeably more airflow and top-end potential. Therefore, it suits trucks that see spirited driving but still retain street manners. However, trucks that tow heavy loads frequently should consider the KC Whistler Stage 1, which is better optimized for sustained towing. Choosing the correct stage ensures the turbo matches how the truck is actually used.

Fueling and Tuning Requirements

To reach its full potential, the KC Whistler Stage 2 Turbo requires a healthy CP4 or an upgraded fueling system. In addition, updated tuning is required to support the increased airflow. Without proper fueling and calibrations, the turbo cannot perform as intended. Because of this, owners must address tuning before operating the vehicle with this turbo installed.

Fitment and Installation Requirements

Fitment depends on model year, so reviewing installation needs before purchase is critical.

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

• 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 ensures proper installation and long-term reliability.

A Versatile Turbo for Real-World Builds

Ultimately, the KC Whistler Stage 2 Turbo (300870) delivers strong performance gains, aggressive sound, and everyday usability. When paired with proper fueling and tuning, it offers a versatile upgrade for drivers who want more power without sacrificing street comfort.