The XRAY 308263 4S Progressive Spring Set is tailored for SLP shock applications and measures 20mm in length. The springs run from a softer C2.3 at initial travel up to C2.6 under higher load, yielding improved traction on turn-in and firmer support as the car leans through the corner.
Progressive springs allow a forgiving initial contact patch then progressively resist compression, which helps reduce twitchiness and keeps the chassis composed when pushing for faster lap times. They suit drivers who want predictable mid-corner behaviour.
Each set of XRAY 4S springs is hand inspected and matched to deliver consistent length and spring rate across the pair, aiding predictable setup changes and dependable on-track performance.
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