Fuel Mileage & Tow Performance Package

1989–1993 5.9L Cummins (12-Valve)

This Fuel Mileage & Tow Performance Package is built for 12-valve Cummins owners who want better fuel economy, lower EGTs, improved drivability, and safer towing performance—without sacrificing reliability.

Rather than random bolt-ons, this package focuses on airflow efficiency, fuel consistency, and thermal control, which is how real MPG gains are achieved on a mechanical-injection Cummins.

Most customers see 1–3 MPG improvements with noticeably cooler exhaust temperatures and smoother throttle response.

🔧 Base Package – What’s Included

BD Diesel Exhaust Manifold – $576.95

• Improves exhaust flow

• Reduces EGTs under load

• Eliminates common factory manifold cracking

• Helps turbo operate more efficiently

FASS 165GPH Fuel System – $788.42

• Provides consistent, clean fuel delivery

• Eliminates air intrusion common on aging factory lift pumps

• Improves throttle response and reliability

• Supports future performance upgrades

Intercooler System (Year-Specific Fitment)

• 1989–1991: CX Racing Intercooler Conversion Kit – $879.00

• 1991–1993: Mishimoto Intercooler + Install Kit – $1,319.00

Benefits:

• Lower intake air temperatures

• Reduced EGTs when towing

• Improved combustion efficiency

• More consistent performance under load

Pusher Cold Air Intake – $250.99

• Reduced intake restriction

• Improved airflow to turbo

• Faster turbo response

• Cooler, cleaner intake air

4K Governor Spring Kit – $172.00

• Improves drivability

• Keeps the engine in a more efficient RPM range

• Reduces unnecessary throttle input

• Better towing control

MBRP 4” Turbo-Back Exhaust System – $689.99

• Reduces exhaust backpressure

• Lowers EGTs

• Improves turbo efficiency

• One of the most effective MPG upgrades for a 12-valve Cummins

💰 Base Package Pricing

• 1989–1991 Base Package Total: $3,357.35

• 1991–1993 Base Package Total: $3,797.35

➕ Optional Add-Ons (Only Select What You Need)

Already have some components? No problem.
Only select the add-ons you want included with your order.

Edge EAS Street Diesel Sensor Kit – $409.95

• Monitors EGT, boost pressure, and fuel pressure

• Helps protect the engine under load

• Encourages smarter driving to maximize MPG gains

Edge Insight CTS3 Digital Monitor – $460.76

• Displays all sensor data on a clean digital screen

• Custom alerts for EGT, boost, and fuel pressure

• Cleaner alternative to multiple analog gauges

Optional Add-On Total (If Selected): $870.71

⛽ Expected Results (Realistic)

• Fuel Economy: +1 to +3 MPG

• Lower EGTs while towing

• Improved throttle response

• More consistent power delivery under load

• Increased long-term reliability

Results vary based on driving habits, tire size, gearing, load, and vehicle condition.

🧠 Why This Package Works

This package improves fuel economy by:

• Reducing intake and exhaust restriction

• Stabilizing fuel delivery

• Lowering intake air temperatures

• Keeping the engine in a more efficient operating range

This isn’t about adding horsepower—it’s about making the engine work smarter, not harder.

🚚 Fitment

• 1989–1993 Dodge Ram 250 / 350

• 5.9L 12-Valve Cummins

• Manual and automatic transmissions

⚠️ Important Notes

• Professional installation recommended

• Intercooler selection is based on model year

• Monitoring is highly recommended for towing and engine longevity

📌 Fuel Economy Disclaimer

Fuel economy gains will vary based on driving style, vehicle condition, gearing, tire size, and load. Aggressive driving may reduce fuel economy.