If you are experiencing a metal pinging sound from your coilovers at slow speeds, while turning, while entering, or exiting an incline such as a driveway, it may be a coil-bind issue.
The most likely issue is that the sway bar is at an abnormal angle, causing the bushing for the sway bar to bind and make that sort of “popping” noise. To fix this, with the car in the air, the sway bar end links need to be loosened, and the sway bar needs to be moved to the accurate position, parallel to the body of the car. Make sure the end links are adjusted to that length, then set the car on the ground, then tighten the end links to spec. Because if the end links were tightened in the air, once the car is on the ground, everything including the coilovers/sway bar/sway bar end links all move, causing the binding and noise.
You may have to check as well the metal washer on the top and bottom of your spring (MacPherson suspension type only), make sure the washer is free from dirt or debris and use either WD-40 or lithium grease to lubricate it.
Also please check if the strut mounts and bearings between the spring and top mounts are already dirty, old, or worn.
But while you are doing this, make sure the preload on the coilovers is at zero as all of our coilovers are designed to run at zero preload, if there is preload, or the other way around - negative preload, it will cause the shock to sit weird in the bearing/spring perch, so when you are turning it will make a metal clunk type noise. Zero Preload means it is tight enough to not move up and down, but still loose enough to spin the spring.
Lastly, the coilover's pillowball plate or top mount bushings may be bad.