Calibrated Power Stealth STR Drop In VGT Turbo | 2017-2023 L5P

Stealth 62.5 VVT Turbo for L5P Duramax (2017-2023)

The Stealth 62.5 is a high-performance, stock-appearing drop-in turbo for L5P Duramax trucks. Designed for fast spool-up, improved EGT control, and strong daily drivability, it delivers up to 625 RWHP while maintaining reliability and towing capability. Supersedes DM1JK1070103000, DM1MO1070103000.

Key Features

• Proven to support up to 625 RWHP with stock emissions
• Gains of 80–100 RWHP over tune-only setups
• 62.5mm 7+7 blade extended tip billet (2618 alloy) compressor wheel
• 65mm 9-blade 713C nickel alloy turbine wheel
• Lightweight rotating assembly (~6% lighter than stock)
• Ported exhaust housing for improved flow
• Direct bolt-on, no core charge

Benefits

• Lightning-fast spool-up and improved throttle response
• Lower EGTs and better heat control under load
• Works with stock tuning, box tuners, or custom tuning
• Zero surge even when towing heavy loads
• Increased durability over factory turbo
• Noticeable, aggressive turbo whistle
• Compressor (62.5mm): 7+7 blade billet design for high airflow (supports ~625 RWHP) and fast response
• Turbine (65mm): Larger 9-blade Inconel wheel improves flow, lowers drive pressure, and reduces EGTs
• Rotating Assembly: Lighter, precision-balanced for faster spool and improved efficiency
• Ported Housing: Increased exhaust flow and reduced backpressure

Fitment

• 2017-2023 Chevrolet Silverado 2500HD/3500HD
• 2017-2023 GMC Sierra 2500HD/3500HD
• 6.6L L5P Duramax