The Correct Track Trailer Alignment and Lift Kit # RR23QX is going to be the best option for lifting your trailer. This will raise your 2023 Cougar MLE by 1-1/4" or 2-1/4". The only other solution would be an axle flip kit but your leaf springs are probably on top of your axles already which would rule that out.
For heavy duty shackles and wet bolts you can use the MORryde Suspension Upgrade Kit for Tandem Axle Trailers w Correct. You will need to choose the kit that matches your current... view full answer...
Hey Scott, the correct SumoSprings kit for your 2019 Keystone Cougar Half Ton would be the part # TSS-107-40 based on the GVWR I found online for your trailer. view full answer...