Traditional bypass shocks offer peerless performance, allowing the suspension control to be position-sensitive as well as speed-sensitive. Said another way, it means the shocks can offer smooth action over the little stutters as well as superior control when the bumps get big.
While the performance is peerless, there are a few downsides to a traditional bypass shock. First, when bypass shocks are used alongside coilovers, you need to fabricate mounts for not one, but two shocks. Finding space to mount two shocks can be a problem, especially up front in the engine bay. Next, running two shocks adds weight to the chassis. Cost is a factor. Two shocks cost more than one. Finally, traditional bypass shocks have spring-loaded check valves that make clicking noises as the valves open and close. The noise isn't an issue on a race vehicle, but it's obnoxious on a daily-driven truck that sees dirt use.
We got to check out King's new IBP internal bypass shocks at the Off-Road Expo in Pomona, California. King had a cutaway model on display, and the internals were unlike any other shock we've seen. Interest piqued, we stopped by the King shop in the ensuing weeks to learn more.
Which vehicles benefit most from the King IBP? Daily-driven trucks that are also used in the dirt; trucks that have mounts only for a single shock per corner; UTVs such as the Yamaha Rhino, the Kawasaki Teryx, and the Polaris RZR; racers in classes that allow only a single shock per corner; any vehicle project that's looking to reduce costs, save weight, and simplify component packaging.
The King IBP doesn't do away with the traditional coilover-and-bypass combo. Instead, the IBP opens up bypass shock opportunities that didn't exist before. It's a new-school bypass shock with new possibilities.