Review on 🚗 Timbren GMRCK15S Suspension Enhancement System: Boost Your Vehicle's Performance by Vincent Pavelko

Timbren is the brand I usually recommend but this setup on my 2017 GMC Sierra is not what I expected. When driving with no load (most of the time) the ride is terrible. When driving over bumps in the road, the axle hits the bumper and behaves as if your truck is "flexing" sharply, causing a front-to-back pendulum effect. The installation corresponds exactly to the instructions and the distance from the bumper to the axle corresponds to the description. I thought maybe the shocks were starting to weaken so I replaced the shocks with an OEM rancho but that didn't fix the problem. The bumpers are too stiff, creating a weightless effect in the driver's seat when you hit a hole in the freeway, seatbelt luck. I pull them out asap to install the AirLift system like my friend did. A bit more expensive but worth the trip and safety.