TUNING & DIAGNOSTICS

CUSTOM TUNING

Custom tunes for Cummins, Duramax, Power Stroke, and Titan, sent to your EZ LYNK or HP Tuners, plus diagnostic appointments at our Rockport shop.

GET A REMOTE TUNE
BOOK APPOINTMENT

SCHEDULE PERFORMANCE DIAGNOSTICS

Pick a date and time that works for you. Our team will confirm your appointment and have your bay ready.

DATE & TIME
VEHICLE
YOUR INFO
TUNING FAQ

QUESTIONS, ANSWERED

What tuning does, what it takes, and what to expect before your truck hits the bay.

Tuning reprograms the calibration tables inside your truck's ECM — the computer that controls fuel delivery, turbo boost, injection timing, and torque management. Instead of the conservative factory calibration that ships to every truck, your truck gets a calibration built around its engine, its modifications, and how you actually use it.

CUSTOM TUNING

REQUEST A TUNE

Need a custom calibration for your truck? Send us your details and we'll get in touch.

REQUEST A TUNE

Tell us about your truck.

Provide a phone number or email — we'll contact you to finalize your tune.

VISIT US

1121 West Market Street
Rockport, Texas 78382

Mon–Fri: 9AM–5PM

PLATFORMS

CUMMINSDURAMAXPOWER STROKETITAN
★5.0on Google· LEAVE A REVIEW →

⚠ DISCLAIMER: All performance tuning products and services are intended for off-road use only. Use on public roads may be illegal under federal and/or state emissions regulations. By purchasing, you accept full responsibility for compliance with applicable laws. All deposits and tuning part purchases are non-refundable. Express Diesel Performance LLC is not responsible for any mechanical failures resulting from tuning modifications.

Express Diesel Performance

© 2026 Copyright. All Rights Reserved.