2008–2025 Peterbilt 337 6.7 Cummins Delete Tuning

2008–2025 Peterbilt 337 Cummins ISB/B6.7 Delete Tuning

Optimize the performance and reliability of your Peterbilt 337 with custom delete tuning for the Cummins ISB 6.7L or B6.7 engine. This tuning solution removes all factory emissions controls and is compatible with major diagnostic tools including EFILive AutoCal V3, Nexiq, and Cummins Inline.

✅ Supported Models:

• Peterbilt 337 (2008–2025)

• Engine: Cummins ISB 6.7L / B6.7

• ECMs supported:

  • CM2150 (2008–2009)

  • CM2250 (2010-2013)

  • CM2350A (2014–2021)

  • CM2450 (2022+)

2024+ ECMS may be locked and require a swap for tuning. If you are unsure if your ecm is locked send us a picture of your ecm sticker for confirmation

🚫 Emissions Systems Deleted:

• DPF – Diesel Particulate Filter

• EGR – Exhaust Gas Recirculation

• SCR/DEF – Selective Catalytic Reduction / DEF system

• Regen cycles and associated trouble codes

🔧 Key Benefits:

• Increased horsepower and torque

• Improved throttle response and fuel economy

• Reduced downtime and maintenance costs

• Eliminates limp mode, DEF usage, and emission-related issues