LSX/LTX & HEMI Performance - Since 2010
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Customer Service

We here at Southwest Speed LLC believe in taking care of our customers. We want to make sure you have an enjoyable experience. With this in mind we have provided several ways for your to contact us in a quick and efficient manner. Please don't hesitate to contact us.

Contact Us

  • Mailing Address:
  • Southwest Speed LLC
  • 5116 Industrial Park Loop NE
  • Rio Rancho, NM 87124
  • Email Address:

Terms of Service

  1. Disclaimers: Actual products may differ from the pictures presented. Southwest Speed LLC is not responsible for typographical, pricing, product information, advertising, or shipping errors. Prices and availability is subject to change without notice. Southwest Speed LLC reserves the right to cancel an order. Some items may be drop shipped from distributors or direct from the manufacturer. A Returned Merchandise Authorization will be issued in the event of a purchasing, or shipping error. Southwest Speed LLC will cancel an order if we are not capable of verifying billing and shipping information given from the credit cards issuing bank.
  2. The use of Long Tube Headers with or without Aftermarket Cats are illegal for installation and use on emission-legal vehicles when operated on public streets or highways. They can only be legally used while participating in sanctioned motorsport racing events. Buyer is solely responsible for usage of aftermarket parts and accessories.
  3. Pricing: Orders will be charged based upon the price at our website's checkout screen where final payment is made. Southwest Speed LLC reserves the rights to make adjustments to pricing after full payment is made if there were any types of errors or changes that had not been recorded during payment.
  4. Sales Tax: Orders billed by Southwest Speed LLC will include sales tax on all purchases made within the state of New Mexico. Southwest Speed LLC reserves the right to charge sales tax (without notice) in applicable states in accordance with any future rules and regulations governed by the purchaser's State and Federal Laws.
  5. System Availability: Southwest Speed LLC makes every effort to maintain 100% system availability. There may be periodic maintenance made to the site. In addition, Southwest Speed LLC is not responsible for orders not processed due to technical difficulties.
  6. Returns: Notify Southwest Speed LLC of any return items within 7 days of receipt of your package. You can e-mail us at to inform us of your situation. Any returns sent without an acknowledgment from Southwest Speed LLC will be automatically rejected. All products returning to Southwest Speed LLC must be unused and in its original state. All packaging must be exactly as sent and intact. Any returns that do not meet these criteria will be refused for return. All returns are subject to a 15% restocking fee. Southwest Speed LLC will not exchange or accept returns for custom orders or used products. All shipping and insurance charges are non-refundable.
  7. Damaged, Incorrect, or Missing Product: In the event of damaged products, please keep the damaged shipping packaging and contact Southwest Speed LLC within 7 days of receipt of your package. Southwest Speed LLC will assist you with the damage claim against the shipping service used. Keeping the original packaging is Mandatory for a successful claim, without proof of packaging the shipping service will not honor any claims! If packages contain incorrect or missing parts, please contact us through to remedy the problem as soon as possible. Inspect all purchases upon receipt and contact Southwest Speed LLC if you have any issues. Even if you are not planning on installing parts immediately. Southwest Speed LLC will only remedy any problems with purchases within 7 days of receipt.
  8. Do not open any sealed package or install any parts if you have issues with them. Southwest Speed LLC cannot accept parts that are used, installed, or modified.
  9. WARRANTIES: Any warranties on the products sold hereby are those made by the manufacturer. The seller hereby expressly disclaims all warranties, either express or implied; including any warranty of merchantability or fitness for a particular purpose, and neither assumes nor authorizes any person to assume for it any liability in connection with the sale of said products.
  10. Availability & Shipping: Product availability and shipping times may vary with manufacturers. Allow 3-5 days for processing in addition to shipping. Customers will be notified in a timely manner when instances of backorder, out of stock, or discontinued items occur. Shipping is included in most purchases. We use UPS, USPS, and FedEx; although, shipping may vary without notice. We currently only ship to addresses located in the United States.