MST® Performance Product Warranty

NOTE: Products that were modified in any way, shape, or form (painted, drilled, sanded, cut, etc) are NOT ELIGIBLE for returns. We highly advise that you check the contents (test fit if needed) prior to installation or modification. MST Performance USA offers a 14 day return policy on most items. On eligible returns, a 20% restocking fee will apply, for products that are no longer needed.

Products that are ineligible for return would be custom orders, BMW OEM products, flash tunes, electronics, turbos, and fluids. Again, products that have been installed, modified or damaged are not eligible for return. If a product is damaged, modified or has been installed, the return will be refused, and the customer is responsible for all shipping costs.

Non-fault / "Change-of-mind" Purchases: These are situations where the purchase was made in error, or if the customer simply changed their mind, and MST Performance USA is not at fault. The are also eligible for return/exchange, however the customer is also responsible for all shipping costs including the cost of shipping to the customer from the initial purchase. Refunds (less the shipping amount) will be determined once we receive the goods back to MST Performance USA and everything has been inspected for damage or tampering. Any sign of damage or tampering will make the purchase ineligible for return/exchange and customer will have the choice to take the item back or forfeit the item completely.

Before sending in products for return, please obtain a RMA number by emailing us right away (please include your order # in the email). Products that are sent in for return or exchange without an RMA will become property of MST Performance USA.

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