For the PAST 5 YEARS, we've been testing 7075 Aluminum links in the ARTECON to ensure that they could handle the abuse of both extreme, heavy duty rock crawling and normal daily driving. We've been pleased with how they've handled the rigorous abuse and how much weight is saved by using is compared to standard steel tubing.
The JL ALUMINUM Mid Arm Kit starts with our 2.0" outer diameter, aerospace grade 7075 Aluminum lower links front and rear loaded and 1.5" OD Aluminum upper links in the rear. The upper front links are solid steel links directly used in Rock Krawler suspensions. The aluminum links are out-fitted with time-tested Rock Krawler brand Krawler Joints with a 1.25" thread on the lowers and 7/8" thread on the uppers with matching jam nuts. These are the same joints shipped in nearly every Rock Krawler lift kit so you know they stand up to the test of time and abuse...not to mention there are millions of them on the streets. Each link is threaded with both a Right Hand thread and a Left Hand thread at opposite ends so it is easy to adjust the length for fine tuning. We've also included wrench flats on each end of the aluminum link so you can easily tighten your jam nuts without marring the aluminum.