STM Updates, Promotions and FAQ

Free shipping to the Continental USA on orders $300 or more!
Some exclusions apply to certain parts and some brands cannot be discounted (read more below).

Below you'll find some common FAQ answered.
If you have any questions or concerns, as always, feel free to Contact Us.

To the Continental USA Only:

We currently offer free shipping on all orders over $299.99 to the lower 48 United States (excludes Alaska and Hawaii.) No code necessary.

If you apply a discount code and your cart total drops under $299, free shipping will not be activated. The total amount AFTER all discounts is what triggers the free shipping.

Exclusions apply. (Some oversize items have a flat-rate fee built in.)

Some products and manufacturers have strict pricing policies and are excluded from any discount codes.

Products excluded from discount codes:


• aFe
• APR Tuning
• ATI Dampers
• ATP Turbo
• Baja Designs
• BC Racing
• Buschur Racing
• Comp Cams
• DriveShaft Shop (DSS)
• Dodson Motorsports
• English Racing
• Extreme PSI
• Fathouse Fabrications
• Forced Performance
• Fortune Auto
• JM Fabrications (JMF)
• Koyo
• MA Performance (MAP)
• Manley
• Novitech
• RaceQuip
• Tactrix
• TiAL Sport
• Tilton
• Unitronic
• Vorsteiner
• WeatherTech
• Weld
• Weldon


• Some large or oversized items

Go to your Cart:
Review/Agree with Terms and Conditions
Go to Checkout Page or verify your PayPal or Amazon Pay account.

Select Payment Method:
Go straight to Checkout with your credit card, or use your PayPal or Amazon Pay.

If you select PayPal or Amazon Pay, you'll be redirected to their page to verify your information, then back to us. It's ok to click "Continue" on their verification page, this isn't the final step and you'll come back to us to finalize the details and discounts before you pay!

On Desktop:
Split screen display will show you your items on the right and you enter your code there and proceed.

On Mobile:
If you are on a mobile device, the layout stacks. Click the "Show Order Summary" at the top to enter your code and review all items. Only one coupon code may be used at a time.

All set! If you have any questions, feel free to give us a call!