The Lexus IS Turbo Bump Stop acts as the last line of suspension to absorb any extreme wheel travel and keep impacts subdued and steering precise. Hidden near the top of the control arm is this Bump Stop, which does not speak up until it is in full compression, but then compresses like a mini spring to settle the chassis and quiet the noise. Every Lexus sedan produced with an IS Turbo powertrain, from the time of launch in 2016 to current trims, accepts the same basic design so that the driver of the car can elevate or depress it and simply get the length to match up perfectly. Upgraded polyurethane allows the Bump Stop to shrug off heat, oil, and daily potholes, resisting deformation that plagued previous rubber pieces. That firmness has a small amount of damping effect, meaning that the lightweight Lexus body tends to go around corners less and provides the IS Turbo with a more connected feel on the road. Because of the predictable engagement of the Bump Stop, emergency swerves remain composed, tires remain planted, and stability electronics function at peak accuracy. Its protective barrier also looks out for shocks, coil springs, sway bars, and bushings, trimming repair bills and adding to the long-term reliability the Lexus badge is known for. Owners rave about how the IS Turbo is so calm over speed humps but feel that it is ready for some spirited back-road running thanks to this little but important Bump Stop. A closed cell structure helps the Bump Stop bounce back instantly, so there is no wasted cushioning and consistent performance in every bump. This Bump Stop excellence is on par with the Lexus philosophy making every IS Turbo a reward to drive. Compact, inexpensive, and engineered for the life of the vehicle, the Lexus IS Turbo Bump Stop ties together comfort, efficiency, and safety and has earned a respected niche in the performance parts world.
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