BigBearTuning is an industry leader in Cummins ECM delete tuning — trusted by truckers, fleet operators, and heavy equipment owners across North America.
We support all Cummins engines including:
• ISX - X15 - X12 - ISX15 - ISX12
• ISB - B6.7
• ISC - ISM
• ISL - L9
• QSX - QSM - QSL - QSB - QSC - QSF
All ECM generations supported:
CM871 - CM2150D - CM2250 - CM2350 - CM2350A - CM2450
Remote Tuning Requirements:
Diagnostic Adapter
(Nexiq USB Link, Cummins Inline, DPA5, Noregon...)
Windows laptop
Internet Connection
What’s Deleted:
✅ DPF
✅ EGR
✅ SCR
✅ DEF
All emission-related sensors and components are fully disabled.
Performance Upgrade:
We set power based on your engine's CPL, up to the maximum OEM-approved safe limit.
DEF gauge remains functional
Always shows level between 70–100%.
No more regens. No more warning lights. No more downtime.
• 12 & 15 liter Cummins
• DEF/SCR/EGR/DPF delete
• Power upgrade included(CPL based)
• 6.7 liter Cummins
• DEF/SCR/EGR/DPF delete
• Power upgrade included(CPL based)
• 8.3 liter Cummins
• DEF/SCR/EGR/DPF delete
• Power upgrade included(CPL based)
• 8.9 liter Cummins
• DEF/SCR/EGR/DPF delete
• Power upgrade included(CPL based)
• 10.8 liter Cummins
• EGR/DPF delete
• Power upgrade included(CPL based)
• Remote tuning(over the internet)
• Max OEM approved power rating
• No diagnostic software is needed
• No regen light
• DEF shows 70-100% level - at ALL times
• Laptop/PC with Windows OS
• Diagnostic adapter(Nexiq, DPA, Noregon, Inline)
• Internet connection
• Team Viewer (free software)
• Hollow out all filters on exhaust
• Block off EGR gas flow
We can work on any Cummins engine with emissions!
Any emission level - CM870 CM871 CM2150D CM2250 CM2350 CM2350A CM2450.
No matter in which vehicle (semi truck) it's installed!
No matter in which big rig (semi truck) it's installed!
Kenworth, Peterbilt, Volvo, Freightliner...you name it - we can do it!
All emission components are deleted:
DPF - DOC - EGR - DEF - SCR
FREE POWER UPGRADE to max OEM approved spec. based on CPL number!
There will be no warnings on dash, and DEF gauge will show level all the time!
DPF regeneration will be disabled, and no more emissions system maintanance is needed.
Delete and remove DEF SCR systems on Cummins engines.
DEF dosing/doser fully disabled!
DEF tank level and temperature sensors are no longer need and can be removed!
All ECM generations supported CM2250 CM2350 CM2350A CM2450.
Any vehicle brand or type!
DEF analog and digital gauges supported and will show level between 70-100%.
EGR delete tuning for Cummins engines.
Your engine will be using clean air only, and that will result with better performance and improved fuel economy.
All ECM generations supported CM870 CM871 CM2150D CM2250 CM2350 CM2350A CM2450.
Any vehicle brand or type!
After deleting EGR, the EGR gas flow needs to be blocked off with steel plates.
This is done to prevent EGR leaking exhaust gas back into intake.
