Contact Us

Trust us, we hate contact forms just as much as the next guy… HOWEVER, this is the best way for us to answer your questions in a timely manner. We promise we will direct your request/question to the appropriate APEX team member that can best assist you. We will get back to you as soon as possible! 

Please leave us a detailed message in the form below and let us know how we can assist you. 

If you prefer snail mail:
APEX Designs & Performance Products
4554 N Forestdale Drive, Unit C14
Park City, UT 84098

For Dealer Inquiries, please email us at

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Frequently asked questions

What length RPV should I order for my wheels?

You will need to measure your valve stem well in order to properly determine which length valve to purchase. It is impossible for us to know the length for every wheel application on the market as wheel width, offset, size often changes the depth of the valve stem well. Please CLICK HERE to watch a video that demonstrates how to properly measure.

What length autoLYNX do I purchase for a 2"-2.5" lift?

The 2" - 2.5" lift is right between the 8" and 10.5" autoLYNX size. The determining factor is your front bump-stop length and shock stroke length. If you have at least a 2" bump-stop extension installed in the front, you can/should run the 10.5" version. If you do not have bump-stop extension installed in the front you will need to run the 8" version. 2" bump-stop extensions are common with most lifts that include a 10" or greater travel shock.

8" autoLYNX works w/ 7" - 9.5" travel shocks and no added bump-stops.

10.5" autoLYNX works w/ 9.5" - 13" travel shocks w/ at least 2" front bump-stop extension.