Mass Air Computer Rebuild Service

Let us rebuild your computer for you!


Ship us your computer and we will fully inspect it, bench test it with our custom equipment, rebuild it, test it with our monitor, and install it in a running Fox-Body for quality control. This service comes with a one-year replacement warranty provided the seal is not broken and a chip is not added. Matt from the YouTube channel GearHead704 did a video about our rebuild service and you can view that by clicking here


Ship to:

Fox Mustang Restoration

Re: Computer Rebuilds

105 Pine Forest Rd

Locust, NC 28097


Include in the package:


Return shipping address


Phone Number

Please Fill out this Google Form with the matching information and a tracking number of the computer being sent to us. 


We will contact you to let you know that we received your computer, then we will put it in line for inspection. If it is rebuildable (most of them are), we will then rebuild it and contact you again for payment prior to shipping it back to you. Return shipping is included in the $225 price.


*Rebuilds are typically done on Mondays, testing on Wednesdays, and return shipping on Fridays.*


Occasionally, we have rebuilt computers available for purchase for $575. These are rebuilt in the same manner described above and carry the same warranty. If we have any in stock they will be listed (insert link to computer core search on website). 


The A9L computers were originally used in the 5.0 5-speed cars from 1989-93, but if you are doing a mass air conversion on a 1986-88 you will also need an A9L. We can rebuild any 1988-93 computer, regardless of the designation, A9P, A3M, C3W.


We are not able to diagnose computer issues prior to receiving your computer. If you need assistance determining whether your computer is not functioning properly, we suggest you take it to a qualified professional in your local area.


Fox Mustang Restoration wants your old computers! Just ship us your old A9L or A9P, they do not need to be in working condition, and we will pay $150 for A9L, A9P, A3M, C3W upon passing our preliminary rebuild test. Our shipping address is: Fox Mustang Restoration, 105 Pine Forest Rd, Locust, NC 28097. Put on the outside of the box "A9P" or "A9L" and put on the inside of the box your name, phone number, email address and shipping address. We will send you an email confirmation and mail you a check or we can PayPal you.


If you need more information please email us at or call 704.888.1278.