This carbon fiber rear shock tower stiffener for the XX4 has a hidden feature: You can still use the stock wing mounts, or you can opt to run wing mounts from the Associated B5m or B6 series using the extra countersunk holes.
We'd like to wish all of our customers a happy and healthy holiday season with your family and friends! We'll be closed from December 19th through January 5th. Any orders placed in this time will ship when we return.