Terms and Conditions

The following Terms and Conditions apply to the use of this Web site as well as all transactions conducted through the site.

  • Legal Notice
  • All notices from MJS Performance LLC to You may be posted on our Web site and will be deemed delivered within thirty (30) days after posting. Notices from You to MJS Performance LLC shall be made either by e-mail, sent to the address we provide on our Web site, or first class mail to our address at:

    10413 County Rd. 76 1/2
    Windsor, CO 80550

    Delivery shall be deemed to have been made by You to MJS Performance LLC five (5) days after the date sent.

  • Copyright
  • All content appearing on this Web site is the property of:

    MJS Performance LLC 10413 County Rd. 76 1/2 Windsor, CO 80550
    Copyright © 2008-2021 MJS Performance LLC. All rights reserved. As a user, you are authorized only to view, copy, print, and distribute documents on this Web site so long as (1) the document is used for informational purposes only, and (2) any copy of the document (or portion thereof) includes the following copyright notice: Copyright © 2008-2021 MJS Performance LLC. All rights reserved.

  • Trademarks
  • All brand, product, service, and process names appearing on this Web site are trademarks of their respective holders. Reference to or use of a product, service, or process does not imply recommendation, approval, affiliation, or sponsorship of that product, service, or process by MJS Performance LLC. Nothing contained herein shall be construed as conferring by implication, estoppel, or otherwise any license or right under any patent, copyright, trademark, or other intellectual property right of MJS Performance LLC or any third party, except as expressly granted herein.

  • Privacy Policy
  • MJS Performance LLC use of personal information that you may submit to MJS Performance LLC through this Web site is governed by the MJS Performance LLC Privacy Policy.

  • Consumer Agreement
  • By purchasing from MJSperformance LLC you agree to pay the full amount upon ordering. All race exhaust that is sold by MJSperformance LLC is strictly for racing purposes only and not for street use, all consumers and dealers that order online or over the phone must comply with their state laws. MJSperformance LLC is not responsible for any action that is taken by consumers or dealers.  All headers except for the R6R are from OEM stock exhaust and are listed as RACE HEADERS due to EPA regulations.

    Cancelled orders before they ship are subject to a 8% and up to 10% charge depending on the card you use. MJS Performance LLC is charged this fee from our merchant service provider.

    We always recommend that the customer have our exhaust installed by a qualified expert, there are no returns accepted if the customer attempts to install parts on their own. You will have 30 days after receiving our exhaust to report any issues.


  • Shipping & Delivery
  • At this time, MJS Performance LLC ships merchandise to locations within the United States and U.S. territories, including Alaska, Hawaii, Puerto Rico, Guam, and the US Virgin Islands. Additionally, MJS Performance LLC ships merchandise to all international locations. For all International customers, the risk of loss/damaged of all merchandise ordered on this Website, pass to you the consumer when the merchandise is delivered to the shipping carrier.

    International customers may be asked for a screenshot of their credit card transaction from their issuing bank.


    ATTENTION CALIFORNIA CUSTOMERS: You hereby agree that your application is strictly for race use only and not for street use.  You are to know your own state and federal laws and take full responsibility from purchasing from MJS Performance LLC

    ALERT: Due to CV19 packages may have a delivery delay, WE ARE NOT refunding any shipping charges if your package does not arrive on time. This statement from USPS can be found on their home page.

  • Sales Tax
  • MJS Performance LLC charges sales tax for merchandise ordered on this Web site based on the applicable state sales tax rate and the location to which the order is being shipped.

  • Return Policy
  • You may purchase merchandise from this Web site by using any one of the payment options listed in (link to Payment Options). MJS Performance LLC reserves the right to change its payment procedures at any time without prior notice to you. All returns are subject to a 25% restocking fee, no exceptions and must be in new condition and unopened original packaging. You are to return the product in unused condition within 5 business days and must have a authorization number or it will not be accepted. All return shipping charges are paid by the customer, any and all original shipping charges that were paid to MJS Performance LLC for shipping the parts to the customer is non-refundable.
    No returns on electrical merchandise OR special orders. All warranty work must be done through the manufacture, no exceptions. No returns after 30 days on other products sold here. MJS Performance LLC has the right to refuse any returns.

  • Store Hours
  • MJS Performance LLC is open Monday-Friday 9:00AM to 5:00PM MST