-What are your business hours?

Currently we are an online ONLY retailer. As with many online retailers, we will try our best to respond within 24-48 hours via email


-When will my items ship?

You can expect updated tracking information to be sent to you on IN-STOCK items within 24-48 hours. Special orders may take up to 3-4 weeks, depending on demand, vendor availability and shipping. Please be patient, tracking will be uploaded as soon as we have it on special order items.



Items can and will ship a variety of ways. We use USPS, UPS and occasionally Fedex for shipments. If you need it a certain way, please be sure to specify during checkout otherwise we will use the carrier of our choice.


-Return Policy-

Any STOCKED item, in new, never installed condition, returned in the original packaging, can be returned within 30 days from date of purchase.

Credit will be issued once item has been delivered and is in the original condition.

Credit card, transaction fees and original shipping charges will NOT be refunded however.

There will be a 20% restocking fee of in stock ONLY items.

Return shipping is payable by the customer.


Damaged, modified or packages missing full contents will NOT be refunded, NO EXCEPTIONS.



Due to the nature of MOST aftermarket performance parts, ALL items are sold as-is and without warranty.

ALL merchandise sold by Mountain Side Performance LLC is only subject to manufacturers warranty and conditions, (if any), and is subject to submission to the manufacturer for inspection and approval for repair or replacement of merchandise. NO EXCEPTIONS

Installation of performance aftermarket products more than likely WILL void the manufacturer's warranty coverage on your vehicle. Some items listed are illegal in some states and are to be used for racing only.


-Colorado Sales Tax-

Colorado Sales Tax will be applied to ALL purchases and shipping whose shipping or billing address is within the state of Colorado. This applies to ALL customers from other states or countries who purchase products and have these products shipped to an address in the state of Colorado.