2017-2023 Duramax L5P Stealth STR Turbocharger (CPS200143)

Fits

The Stealth STR Turbo is an upgraded direct replacement turbocharger for 2017-2023 Chevrolet Silverado and GMC Sierra 2500HD/3500HD trucks with the 6.6L L5P Duramax diesel engine. It combines the affordability of a stock turbo replacement with stronger drop-in performance, improved durability, and excellent drivability.

Whether you are looking for more power, better EGT control, or a reliable replacement for the factory turbo, the Stealth STR delivers a strong balance of response, airflow, and towing performance. With an Air Grabber compressor wheel, high-flow Inconel turbine wheel, lighter rotating assembly, and ported exhaust housing, this turbo is built to perform while retaining stock-like fitment.

Part Number: CPS200143

Supersedes: DM1JK1070103000, DM1MO1070103000, DM1JK1070103010, DM1MO1070103010

• Proven to support up to 625 RWHP with stock emissions
• Extra airflow to make 80-100 RWHP over tune-only L5P setups
• Works well with box tuners, custom tuning, or without tuning
• Lower average EGTs and better overall EGT control
• Built to last with more durable components
• Lighter rotating assembly than stock for lightning-fast spool-up and immediate throttle response
• Loud turbo whistle from the 9-blade turbine
• Zero surge, even when towing heavy loads

• No core charge
• The factory L5P actuator has a low failure rate and can usually be retained unless actuator-related codes or known actuator damage are present
• This turbo must only be operated with tuning that uses stock minimum and maximum vane position tables
• Non-stock vane position tuning can cause excessive exhaust pressure and boost, which may shorten turbo or engine life and may void the turbo warranty

Air Grabber Compressor Wheel

• Airflow to support up to 625 RWHP with emissions intact
• 63mm 7-blade design provides higher airflow than stock
• Sizing is optimized for weight and efficiency
• Lighter wheel design helps provide fast spool-up
• Recessed "Super Back" design provides added weight reduction
• Air Grabber technology provides additional airflow
• Made from aerospace-grade billet aluminum
• Peak boost of 40+ psi

High-Flow Inconel Turbine Wheel

• 65mm exducer compared to 62.5mm stock
• 9-blade design provides higher flow and lower EGTs under load
• Produces a noticeable turbo whistle
• Provides an excellent boost-to-drive pressure ratio
• Improves durability over the stock turbine wheel

Rotating Assembly

• 6% lighter than the stock rotating assembly
• Provides lightning-fast spool-up
• Boosts turbo efficiency and lowers drive pressure
• Precision balanced in-house

Ported Exhaust Housing

• Larger exhaust port opening matches the larger turbine
• Improves exhaust gas flow post-turbine
• Helps reduce back pressure

• One Year Limited

• 12709701044
• 11547786
• 12683985
• 12689094