Cummins Heavy Duty Tuning | EFILive

Cummins Heavy Duty Tuning | EFILive
Cummins Heavy Duty Tuning | EFILive
Cummins Heavy Duty Tuning | EFILive
Cummins Heavy Duty Tuning | EFILive

Cummins Heavy Duty Tuning | EFILive

Regular price $750.00
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Unlock your Cummins’ full potential with custom EFILive heavy duty tuning. Better performance, improved drivability, and emissions-compliant tunes backed by Ryan Milliken.


EFILive × Cummins Heavy Duty

Cummins Heavy Duty Tuning...

Medium and Heavy-Duty Cummins custom tuning now available via EFILive! Model years 2001 and newer are supported — applications include but aren't limited to RV's, Class 8 Trucks, Dump Trucks, and Marine equipment.

Better performance, improved drivability, and emissions-compliant tunes backed by Ryan Milliken.

Real Results

2018 Cummins 8.9L "L9" / "ISL"
Dynamax Force HD Super C RV

Before

360hp / 1150tq — factory-limited well below its rated 300–450hp and 860–1250tq potential from Cummins.

After

~415hp / 1225tq with improved pedal response and highway speed limiter per the customer's request.

2019 Cummins 6.7L "B6.7"
Forza 36H Pusher Style RV

Before

340hp / 700tq — well below its 200–360hp and 520–800tq range from Cummins.

After

~410hp / 850tq — 15% faster 0–60, +20% power (+60hp/150tq), increased highway speed limiter.

2021 Cummins 8.9L "L9" / "ISL"
Another Super C RV

Before

360hp / 1150tq — same factory-restricted ratings across the 300–450hp, 860–1250tq window.

After

450hp / 1250tq per customer request — tows occasionally, so max power was the right call.

Performance Tuning

Why Get HD Tuning?

These engines are often over built and turned way down for their specific application's to meet the manufacturers requests, leaving lackluster experience behind the wheel and slow pedal response — barely enough power to get out of its own way, let alone if a trailer is involved.

We simply allow the engine to run up to its full potential while adding increased pedal response, increased available engine speed, and increased highway speed limiters (if applicable). Think of it like taking the restrictor plate out and allowing the engine to run how it should have from the factory.

Application Support

Can We Tune It?

There are a multitude of applications that Cummins has put out since 2001. The short answer is "YES, we can tune that!" — there are however some stipulations and key differences between them, mostly revolving around EFILive's capabilities with each control module.

The older CM8XX units (typically 2001–2010) lack the ability to data log or read/clear DTCs, but we can still read/write tune them. All newer CM2XXX units (2007–Current) have full capabilities. Visit the EFILive website to check your specific application, or feel free to reach out.

Check Your Vehicle

Hardware Required

What Do I Need
to Get Started?

  • EFILive V3 FlashScan or AutoCal
  • Cummins HD License
  • 9 PIN Adapter (Green or Black)
  • Laptop w/ USB port

See It In Action

Real HD Tuning — On The Road