Reliable Power. Less Downtime. Maximum Efficiency.

Western Star trucks are known for strength, durability, and rugged performance—but their emissions systems can cause expensive downtime, constant repairs, and reduced fuel economy. That’s where TM AG Tuning, North America’s most trusted heavy-truck tuning company, delivers the solution.

TM AG Tuning provides complete DEF, DPF, and EGR delete tuning for Western Star trucks equipped with Detroit and Cummins engines. Whether you operate a Western Star 4700, 4800, 4900, 5700, or 6900, our tuning services restore reliability and eliminate the major issues caused by emissions components.

For these trucks, we require both the ECU (Engine Control Unit) and the ACM (Aftertreatment Control Module) to be sent to us. This ensures a proper, permanent, and stable tune.
Extra horsepower and torque are included at no additional charge if you want more pulling power.

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What Are DEF, DPF & EGR Systems?

1. DEF (Diesel Exhaust Fluid) System

The DEF system injects urea into the exhaust to reduce NOx emissions. While it’s environmentally helpful, it commonly causes:

• No-start countdowns

• Poor fuel economy

• Frozen DEF tanks

• Faulty NOx sensors

• Costly DEF pump failures

2. DPF (Diesel Particulate Filter)

The DPF traps soot until it reaches a limit and performs a “regen.”
When the DPF becomes restricted or fails:

• The truck loses power

• The engine derates

• Fuel economy drops sharply

• Forced regens become constant

• Sensors clog or fail

3. EGR (Exhaust Gas Recirculation)

The EGR valve routes exhaust gases back into the intake.
This leads to:

• Carbon buildup

• Higher engine temps

• Turbo and intake soot contamination

• Reduced performance

• More frequent breakdowns

When all three systems start to fail, you deal with warnings, limp mode, repeated shop visits, and big repair bills.

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Benefits of Deleting DEF, DPF & EGR on a Western Star Truck

When TM AG Tuning completes your delete tune on both ECU and ACM, your Western Star becomes the truck it should’ve been from the factory—efficient, powerful, and reliable.

✔ Increased Horsepower & Torque (Included FREE)

We include a safe, reliable performance tune at no extra cost.
Expect:

• Stronger pulling power

• Faster spool-up

• Increased throttle response

✔ Better Fuel Economy

Most fleets and owner-operators see:

• 10–20% better MPG

• Less wasted fuel from regens

• Improved overall engine efficiency

✔ No More Derates or Limp Mode

All aftertreatment limitations are removed:

• No more regen lights

• No DEF-related shutdowns

• No more EGR flow codes

✔ Longer Engine Life

Without soot recirculation and exhaust restrictions:

• Cleaner oil

• Lower engine temperatures

• Less carbon buildup

• Less turbo strain

✔ Massive Cost Savings

Eliminate repeat failures:

• DEF pumps

• NOx sensors

• DPF replacements

• DOC/DPF cleaning

• EGR coolers & EGR valves

Many customers save $5,000–$15,000 per year in repair and downtime.

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Why TM AG Tuning Is the #1 Choice for Western Star Delete Tuning

✓ We Tune More Equipment Than Anyone Else in North America

Over a decade of experience, nearly 300 dealers, and thousands of trucks tuned.

✓ You Send Us the ECU & ACM — We Do the Rest

Shipping is simple. Fast turnaround. Perfect results.

✓ Lifetime Warranty

If the ECU ever dies or gets reflashed by a dealer, we re-delete it FREE.

✓ Dedicated Phone Support

No other tuning company offers full-time support staff to help customers and dealers.

✓ Proven, Reliable, Safe Tunes

We don’t use risky “Mexico files” or shortcuts. Every tune is built in-house for:

• Durability

• Low exhaust temps

• Clean operation

• Long-term reliability

Supported Western Star Models

We support delete tuning and performance tuning for:

• Western Star 4700 (Detroit or Cummins)

• Western Star 4800

• Western Star 4900

• Western Star 5700

• Western Star 6900

Detroit DD13, DD15, DD16 and Cummins ISX/X15 engines supported.

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Ready to Fix Your Western Star for Good?

Get more power, better fuel economy, and eliminate the headaches—once and for all.

📞 1-888-630-7226
🌐 www.tmagtuning.com
✉ info@tmagtuning.com

TM AG Tuning — Tuning equipment bit by bit.