Terms and Conditions


M4 Products, L.L.C. stands behind the quality of its products with a one (1) year limited warranty for defects in workmanship and materials. This warranty is provided to the original purchaser only, and any warranty claims must be accompanied by an original receipt or invoice showing proof of purchase.

Issues caused by improper installation or modifications, exposure to chemicals, improper care, or lack of maintenance are not covered under this warranty. Due to the nature of high performance products, it is not possible nor does this limited warranty cover or guarantee the performance of any product. Any defective exhaust system will be repaired or replaced by M4 Products, L.L.C. once the item(s) are returned and found to be defective. Please use the procedures for RETURNS in the paragraph below. M4 Products is not responsible for any other expenses incurred by the customer under this limited warranty. M4 reserves the right to determine whether the conditions of this warranty have been met, and is the sole party in determining whether this warranty is void due to improper installation or care. The duration of any implied warranties are limited to the duration of the express warranty.


New and unused items may be returned if they are accompanied with an RA (Return Authorization) number and a copy of the original invoice. If you are in question about the product you purchased or its installation, DO NOT START THE MOTORCYCLE. Once a system or product has been used or modified, it cannot be returned for credit or exchange. If needed, please call your dealer or M4 Products at
(972) 481-9300 for technical assistance.


It is important to have your exhaust system repacked approximately every 5,000 miles.
It is important to know that different materials and components may require different cleaning methods. In general, clean your system when it is cold to prevent spots from burning into the surface, and avoid any harsh chemicals or cleaning products which are acidic. For more detailed cleaning instructions, visit the Use and Care guide.


While some M4 exhaust products are “replacement parts” under CARB regulations, and some may not exceed the federal EPA noise standard, in general, M4’s products are designed and intended for closed course competition use only. Please check the emissions tab on individual part number pages for additional information. It is the customer’s responsibility to know their local and federal laws. M4 Products will not be responsible for any incidental or consequential damages, contingent or otherwise, including expenses for injury arising directly or indirectly from the use of exhaust system products.

If damage occurs to any item(s) in transit, it is the responsibility of the carrier. Damage claims of this nature must be made with the carrier.

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