Duramax Tuner L5P / L5D Stealth Mach 1 (64) Turbo W/ Actuator (2017- 2019)

L5P / L5D Stealth 64 Turbocharger – Boost Starts Here

The Stealth 64 is the perfect upgrade for drivers who want more power without sacrificing drivability. Built specifically for 2017+ L5P/L5D Duramax engines, this turbo strikes the ideal balance between towing reliability and street performance, delivering airflow to support up to 700 HP.

Power & Efficiency

Supports up to 700 HP

Proven to make 650 RWHP with emissions intact and basic mods

Capable of 41 psi boost at sea level

Competition tested with advanced setups for 700+ RWHP

Custom Billet Compressor Wheel

64mm, 11-blade design for wide efficiency range

Lightweight yet strong for quick spool and durability

Produces 74 lbs/min airflow vs. 60 lbs/min stock

Designed to prevent surge, even under heavy towing or lugging

Oversized Turbine Wheel

Exclusive 9-blade, high-flow configuration

Reduces drive pressures at high load

Improves exhaust energy efficiency

Creates the signature “Stealth whistle”

HFV (High Flow Vane) Technology

Proprietary vane and nozzle ring assembly engineered in-house

Taller and wider vanes matched to the turbine for high-load efficiency

Retains factory exhaust brake and provides faster throttle response

Built for Real-World Use

100% new parts and electronics

No core charge required

Designed and spec’d by experienced tuners—easy for any custom tuner to calibrate

DuramaxTuner offers support for custom tuning adjustments if needed

Is This Turbo Right for You?

Choose the Stealth 64 if you:

Already have or plan to add custom tuning

Tow regularly and want peace of mind against surge

Rely on your truck daily and need both performance and reliability

Want extra horsepower without losing street-friendly manners

Actuator Recommendation

The L5P/L5D actuator is extremely reliable thanks to its well-cooled design and location away from high-heat zones. Unless you’re seeing actuator-related codes or confirmed issues, reusing the factory actuator is recommended.

Optional Boost Tester

Pair your turbo with the Stealth Boost Tester to keep your charge-air system in top condition. Boost leaks reduce power, raise EGTs, and cut fuel economy. This tester allows you to check the system from turbo to intake, including the intercooler and EGR components.

Features include:

Heavy-duty regulator with precise adjustment

Liquid-filled gauge for stable readings

CNC-machined adapter for exact fit

Durable seals and metal construction

Built in the USA from premium materials

Important Notice

This turbo uses a customized vane/nozzle ring assembly engineered for response and power.

It must be operated with tuning that maintains stock minimum and maximum vane position tables.

Using altered vane settings can cause excessive exhaust pressure, leading to reduced turbo or engine life and voiding warranty.

Warranty

Backed by a 1-Year Unlimited Mileage Warranty, covering quality and craftsmanship.