There are several potential options for suspension enhancement on your 2018 Keystone Impact 361 Toy Hauler. It sounds like you were looking to upgrade the equalizers so I'll start there.
You can add an equalizer upgrade kit like the Equa-Flex Cushioned Equalizers # LC279688, but you will want to measure your existing equalizers to make sure they match up. This will fit if your current equalizers are 7-1/2" long, although a slight variance will be fine. In addition to these equalizers... view full answer...
That Dexter number normally cross referenced with a 3,500 lb axle that measures 25-1/4 inch like with our # e57SR. The highest rated spring we have in this length is the # e34SR which is for a 6,000 lb axle. view full answer...