out of stock until April 2022, can take weeks or months to ship due to shitty production times from Bilstein.
We offer these 5165 remote-reservoir rear shocks for the Titans in lengths from 24-32 to fit from stock to 6" rear lift. We modify the bushings on both ends to make them a direct bolt-on. 
To get the length needed, we need to measure the distance from the top to bottom shock bolts with the truck parked on level ground. We then add 3-4" to that number to get the proper extended length. 
These shocks use the same valving as the 5125 series but offer a bit more shaft travel for the same overal length.