Cummins EZ LYNK 5.0/6.7 Tune Package (2010–2021)

Off-Road Use Only: The products sold on this website are intended for off-road use only, and may not be legal for use on public highways where pollution control laws apply.

Check Local Laws: Before purchasing and installing any of these parts, please check your local and state laws to confirm whether the modifications are legal in your area.

Professional Installation Recommended: These kits and parts are strongly recommended to be installed by professional mechanics only. Improper installation may lead to performance issues or damage to your vehicle. Unless specified differently on the product page, our parts do not include installation instructions. They are intended for individuals with a proficient understanding of mechanical systems and procedures. Like many aftermarket parts compatible with a variety of vehicles, minor adjustments or modifications may be necessary during the installation process. We cannot accept returns or offer refunds on the basis of an inability to complete the installation due to the absence of instructions.

Warranty: The use of these parts will void the warranty of your vehicle. Please confirm with your vehicle manufacturer before purchase and installation.

No Liability: DieselPerf is not responsible for any damage or issues that may arise from the use of these parts.

Product Images: Product images are for illustrative purposes only and may differ from the actual product due to manufacturer design changes or improvements.

No Performance Guarantees: While these parts are designed to enhance the performance of your vehicle, no guarantees are made regarding the specific performance gains that will be achieved.

We are dedicated to delivering the auto parts you need to your door as efficiently as possible. As a professional supplier of diesel truck emission system accessories, DieselPerf continuously refines our shipping services to ensure reliable, timely delivery that meets your expectations for speed and security.

1. Shipping Address Guidelines

To minimize costs and ensure smooth delivery, follow these tips when providing your address:

• Accuracy: Double-check your shipping address for errors before placing an order.
• Residential vs. Business Classification: If your business operates from a residential location, it will be classified as a residential address, and delivery fees will be charged accordingly.
• Contact Information: Provide an accurate phone number. Carriers may need to reach you to verify delivery details—failure to do so could cause delays.

2. Multiple Items Shipment

We ship orders as items become available, so you may receive multiple shipments for a single order.No additional shipping fees will be chargedfor these separate shipments.

3. Shipping Partners

We collaborate with leading carriers including USPS, UPS, FedEx, DHL, and Amazon Logistics. We prioritize shipping from the nearest warehouse (U.S. or Hong Kong facilities) to your location. While most orders are delivered within5–15 business days, inventory availability varies—items shipped directly from manufacturers or requiring transfer may take longer.

4. Damaged, Missing, or Lost Shipments

For Damaged/Missing Items

If you receive damaged items, incomplete orders, or suspect issues, take these stepsimmediately:

1. Clearly note the damage/missing items on the delivery receipt before signing.
2. Retain your copy of the delivery receipt.
3. Contact our customer service team within 2 business days (email: service@DieselPerf.com; phone: +13250131608/+85253810098).
4. Keep all damaged packaging materials for inspection.
5. Take photos of the damaged items and packaging to support your claim.

For Lost Shipments

In rare cases of lost shipments, we work directly with the carrier to locate your items. Carrier dock checks typically take2–7 business days. If found, delivery will proceed; if deemed lost, we will collaborate with you to find a satisfactory resolution (e.g., replacement or refund).

5. Delivery Timeframes

• Order Processing: Our warehouses aim to process and dispatch orders within 1–2 business days.
• Transit Time: Most items ship from U.S. warehouses, with common carrier delivery taking 1–10 business days (ground shipping typically 7–10 business days). Items from manufacturers or international locations may have longer transit times.
• Holiday Impact: Allow extra time for delivery during major holidays. Our warehouses observe Christmas, New Year’s Day, Memorial Day, 4th of July, Labor Day, and Thanksgiving. Carriers may have additional holiday observances.
• Force Majeure: Unforeseen events (e.g., natural disasters, global disruptions) may extend shipping times beyond standard estimates.

For further questions, contact our support team during business hours (Monday–Friday, 9:00 AM–6:00 PM).