Optimum Tuning by ZAC Motorsport Optimum Tuning is ZAC Motorsport’s in-house performance calibration division. Every...
Buy with confidence from a family run business that values customer service.
30 day returns, Unrivalled Warranty
Questions? sales@zacmotorsport.com
ECU Reflash required? YES
Optimum Tuning is ZAC Motorsport’s in-house performance calibration division. Every tune is developed to deliver the perfect balance of power, response, and reliability, customised for your specific vehicle setup.
Unlike generic flash files, Optimum calibrations are tailored to your intake, exhaust, altitude, fuel quality, and driving style — ensuring the engine operates efficiently in all conditions. The result is smoother throttle control, stronger mid-range torque, and sharper overall performance without compromising drivability or engine safety.
Our remote tuning process is simple: connect your laptop using the ZAC Motorsport Optimum Tuning Tool, and our specialists fine-tune your ECU live over a secure connection. Optional data logging and revision packages are available for those seeking absolute perfection.
Why choose Optimum Tuning:
Custom ECU calibration for your unique setup
Tuned for local fuel quality and climate conditions
Optimised boost, torque delivery, and throttle mapping
Remote service with full professional support
Optional data logging and refinement for maximum results
Optimum Tuning gives you more than just added power — it delivers performance that feels engineered specifically for your car.
| MODEL |
Stage 1 "BRONZE" |
SUPPORTING MODS |
Stage 2 "SILVER" |
SUPPORTING MODS |
Stage 3 "GOLD" |
SUPPORTING MODS |
Stage 4 "PLATINUM" |
SUPPORTING MODS | ULTIMATE HP | SUPPORTING MODS |
|---|---|---|---|---|---|---|---|---|---|---|
| A45 (W176) | +50 | ZAC Cold Air Intake | +100 | + ZAC Downpipes | +175 | + ZAC SHF Turbo | +225 | + HPFP Upgrade | Coming Soon | Coming Soon |
| A45S (W177) | +89 | Coming Soon | +150 | + ZAC Downpipes | Coming Soon | Coming Soon | Coming Soon | Coming Soon | Coming Soon | Coming Soon |
| C63 (W204) | +53 | ZAC SHF Filter Kit | +103 | + ZAC Exhaust Headers | Coming Soon | Coming Soon | Coming Soon | Coming Soon | Coming Soon | Coming Soon |
| C43 (W205) | +53 | Coming Soon | +113 | +ZAC Downpipes | +153 | +ZAC SHF700 Turbos | Coming Soon | Coming Soon | Coming Soon | Coming Soon |
| C63 (W205 476hp) | +94 | ZAC Cold Air Intake | +144 | +ZAC Downpipes | +314 | +ZAC SHF900 Turbos | +400 | +HPFP Upgrade | 500+ | Contact Us |
| GLC43 (X253) | +53 | Coming Soon | +113 | +ZAC Downpipes | +153 | +ZAC SHF700 Turbos | Coming Soon | Coming Soon | Coming Soon | Coming Soon |
| GLC63 (X253 510hp) | +94 | ZAC Cold Air Intake | +170 | +ZAC Downpipes | +310 | +ZAC SHF900 Turbos | +400 | +HPFP Upgrade | Contact Us | Contact Us |
| E63 (W212 585hp) | +75 | ZAC SHF Filter Kit | +125 | +ZAC Downpipes | +185 | +ZAC SHF800 Turbos | +255 | Contact Us | Contact Us | Contact Us |
| E63 (W213 612hp) | +118 | ZAC Cold Air Intake | +178 | +ZAC Downpipes | +310 | +ZAC SHF900 Turbos | +340 | +HPFP Upgrade | +400 | Contact Us |
| GLE/S (V167 612 hp) | +168 | ZAC Cold Air Intake | +250 | +ZAC Downpipes | +310 | +ZAC SHF900 Turbos | +340 | +HPFP Upgrade | 400+ | Contact Us |
| G63 (W463a 585hp) | +146 | ZAC Cold Air Intake | +176 | +ZAC Downpipes | +300 | +ZAC SHF900 Turbos | +365 | +HPFP Upgrade | 400+ | Contact Us |
| AMG GT (C190 476hp) | +114 | ZAC Cold Air Intake | +164 | +ZAC Downpipes | +324 | +ZAC SHF900 Turbos | +400 | +HPFP Upgrade | 500+ | Contact Us |
WARRANTY:
We stand behind every product we make. Our warranty reflects the confidence we have in our design and engineering. If you have any issues, please don't hesitate to reach out — sales@zacmotorsport.com
ZAC Motorsport products are warranted against defects in materials and workmanship for the original purchaser from the date of purchase. Coverage periods vary by product type:
Covers defects in materials and workmanship across our standard product range including intakes, downpipes, exhausts, intercoolers, and engine bay components.
Limited warranty valid from date of receipt. These products have a shorter warranty period due to the nature of their intended use and performance application.
Satisfaction guarantee from date of purchase. If you are not satisfied with your tune within 30 days, contact us and we will work to resolve it.
Custom and made-to-order products, forged wheels, and brake components are not covered under warranty.
This warranty does not cover:
The following will void your ZAC Motorsport warranty:
If your product is confirmed defective under warranty, we will repair it at no charge. If repair is not possible, we will replace it with a product of similar composition, or at our sole discretion, refund the full purchase price excluding freight costs — only once the product has been returned and inspected. There is no charge for inspection. Return freight is the responsibility of the customer.
Email us at sales@zacmotorsport.com with the following:
We typically respond within 1 business day, Monday – Friday, 8:00am – 5:00pm EST. We'll work with you to find the best resolution as quickly as possible.
Some ZAC Motorsport products are designed for performance use and may not comply with emissions regulations in all regions. It is the customer's responsibility to verify local emissions laws and ensure compliance before installation. ZAC Motorsport cannot be held responsible for any non-compliance in emissions testing.
We are committed to resolving any issues fairly and promptly. If you have a concern with your order or product, we ask that you contact us directly at sales@zacmotorsport.com before initiating a dispute or chargeback with your payment provider. In most cases we can resolve issues quickly without the need for third-party intervention.
Customers who initiate chargebacks without first attempting resolution through our support team may have their warranty voided, their account suspended, and future orders declined.
Included in the box: