MadJack Diesel Performance makes every effort to ensure your privacy and safety online. We will not give any information about you to others without your express permission. We use your customer information only when it will be important for us to contact you regarding your order and special offers we think you'll find valuable.


This site has security measures in place to protect the loss, misuse and alteration of the information under our control. We use SSL (Secure Socket Layer) technology to encrypt your data.
This site may also contain links to other sites. We are not responsible for the privacy practices or the content of such Web sites.


We use emails to communicate with you, to confirm your placed orders, and to send information that you have requested. We also provide email links, as on our Contact Us page, to allow you to contact us directly.
The information you send to us may be stored and used to improve this site and our products, or it may be reviewed and discarded. However, your information will not be shared with third parties ever! We do not sell information to any 3rd party nor will we use your information to spam you with any affiliates. We may send an announcement once in a great while to promote or notify you of a special we have going on.


We use a secure credit card processing company to process our merchant funds for goods and services. We accept Visa, MasterCard, American Express, Discover and PayPal for your convenience. We take every precaution to protect against credit card fraud.
Q: Why must I set up an account?
A: We highly suggest you set up an account so you can track your order, shipments and make any returns easily.
Q: Do you really need more than one address?
A: We only need an additional address from you if your billing and shipping addresses are different. In order to protect against credit card fraud, your billing address must match the address on the credit card. If you would like us to ship to a different address, simply provide another ship to address.
Q: Why do you need the security code on the back of my card?
A: This allows us to verify you have the card in your possession at the time of purchase and to protect against fraudulent charges.


When purchasing items from MadJack Diesel Performance, please understand that these are performance products and are "use at your own risk". It may be necessary to remove the unit before taking your vehicle to the dealer for service as it may interfere with diagnostic equipment.
Please review Your Vehicles Warranty and the Installation of Aftermarket Products for more information concerning your rights when installing performance parts. Buyer accepts full responsibility for the proper use and service of all products and waives all liability claims against MadJack Diesel Performance. The purchase and installation of products indicates buyer's acceptance of these conditions.
By submitting an order, you declare you have read and accept all the terms, conditions, and responsibilities of your purchase.
If you would like specific clarification on The Federal Magnusson-Moss Warranty Act and your rights, please visit SEMA.org for more information on this issue.

Shipping and Processing Times

Most shipments arrive within a week, depending on your location. If you would like to track your order, please log in to your account for any available tracking numbers or check your email for updates.

We use UPS and the US Postal Service to ship our products. We try to process all orders the same business day, with the exception of holidays and weekends, but processing times can vary due to products & circumstances, so please allow 24-48 hours for processing, or longer for special order items. We reserve the right to alternate between carriers at our discretion based on products ordered. Cut off time for next day delivery is 2:00 p.m. PST, however this may vary depending on availability and any processing delays. Some items are packaged in USPS flat rate boxes and will be delivered by the Post Office. Some shipments may require truck freight due to weight and appropriate charges will apply.

Many of our items will be shipped "adult signature required" due to the cost of parts and the loss rate. A signature will be required at your delivery address unless you release us from liability and authorize delivery without signature. If a shipment is refused, has a bad shipping address supplied by you or non-deliverable and is returned to us, you will be responsible for any re-delivery charges and or restocking fees. We are not responsible for addresses deemed un-deliverable or redirected for pick-up at an alternate location by the carrier. If we receive an address correction fee from UPS, that charge can be as much as 14.00 and we will charge you that fee automatically.

UPS maintains the option to REQUIRE a signature at the time of delivery, regardless of the recipients' request to leave the packages at the door. We make every effort to ship as requested but, the carrier reserves the right (as the responsible party) to make any changes based on the value of the shipment or other liability considerations such as apartment/condo complex where the package is not secure to that addressee only. Other liability considerations would be yards fenced in with dogs that may be deemed by the UPS driver that they will damage the package if left.

Occasionally, the shipping calculator on our site does not accurately compute the freight charges especially when it comes to Overnight & 2nd day air service. One of the big factors in mis-calculated shipping charges is dimensional weight. UPS will charge dimensional weight where a package isn't heavy enough for its size deemed by UPS. We have no control over this and if we receive dimensional weight charges we will pass those along to you by charging the increased fee put on us by UPS. In those instances where the initial charge for freight is not sufficient to cover our shipping costs, we will contact you to collect the difference in costs or arrange a different shipping method.

International Shipping

International shipments and shipments outside the lower 48 states are subject to shipping quotes and approval. We reserve the right to cancel an order and issue a full refund for shipments not covered in our regularly serviced area. The customer will be responsible for all duties, taxes, and fees for International Shipments. Any uncollected fees will be charged to customer and cannot be refunded. Customer agrees to this policy by purchasing with MadJack Diesel Performance. All items will be valued at full purchased value.

Back orders or Delays

If an item is on back order or must be drop shipped from a manufacturer, we will notify you via email once we are notified by the warehouse. Make sure we have a valid Email address for you!

Some items are special order or come directly from the manufacturer. Delays in processing times or shipping can occur for these items. Your patience is appreciated.

Periodically, a part may be discontinued or temporarily unavailable that is listed on our website due to changes or production issues by the manufacturer. We make every attempt to maintain current information and are not responsible for any manufacturing delays

Refunds & Returns

We accept returns only after a verbal ok from us. We will charge you a 20% restock charge for any return other than a broken (in shipping) part. You the customer are responsible for all shipping charges for return items even if we arrange the return shipping for you. All returns must be resalable to receive a refund less the restocking charge. No refunds or returns on electronic items.
Why do we charge a restocking fee?
Remember if you used a credit card to pay we absorbed the fees related to processing that card. Included in our restocking charge is credit card processing fee's for refunding that same card because we pay whether we are processing or refunding. All packaging materials that we paid for when we shipped your order are now not usable and if you received free shipping on your order we have just eaten the shipping on your returned item. Thank you for your business and understanding with this policy.