Thunder Lane builds hand-assembled, bespoke-valved coilover systems for the Lexus IS — the IS200 (XE10, 1999–2005) in both TL-ONE single-adjustable and TL-PRO true 3-way form, and the IS250 (XE20, 2005–2013) with the TL-ONE system. These rear-drive chassis are favorites for grip and drift builds alike, and because every kit is built to order, the same platform can be valved for either — or for a compliant fast-street setup.
Every kit is assembled per order in Poland with 46mm electroplated, fully rebuildable monotube dampers, 2.5" springs, and CVP + PVP dyno graphs documenting your exact valving. TL-PRO adds independent rebound, low-speed and high-speed compression adjustment with remote reservoirs for serious time attack and competition work. Spring rates are finalized with you before production begins; lead time is 4–6 weeks. Start with the Lexus IS coilover buying guide to pick the right tier for your build.