The H&R 29122-1 is a progressive-rate sport spring kit for the 2WD Lexus IS250, covering 2006 through 2013 model years. The manufacturer lists an approximate drop of 1.4 inches at the front and 1.3 inches at the rear, and says its sport springs are progressive wherever the application allows. Compared with stock coils, that gives a lower stance and a tighter wheel gap while keeping the ride usable every day, which makes it a practical choice for IS250 owners who want a measured drop rather than a dramatic one.
Owners on user forums describe the ride as firm but controlled, and one reports the fender gap closing noticeably. Forum members also note that some side-to-side unevenness after install is typical for lowering springs on this chassis, and that stock shocks may wear faster under a lowered ride, so plan for dampers if you keep the car long-term. Because the IS250 also came in AWD, confirm the 2WD application before ordering, since forum discussion points to a separate AWD spring from H&R.
The manufacturer's listing for this part number covers the 2WD chassis. Forum discussion indicates H&R offers a separate application for AWD models, so AWD owners should confirm the correct part number with the manufacturer before ordering.
Yes. The manufacturer advises checking alignment after any ride height change and following factory service-manual specifications to get as close to factory settings as possible.
Owners on user forums report that uneven drop is common with lowering springs on the IS250 and that it can settle over a few weeks of driving. Those seeking a perfectly even stance often turn to coilovers.
Expect a moderate DIY job. Front struts generally require a spring compressor, and owners on user forums note that the front assembly is the harder side of the job. Follow the manufacturer's guidance on orientation: if the spring is the same at both ends, the closer coils go up; if the ends differ, match the factory spring. Plan for a professional alignment afterward, since the manufacturer recommends it after any ride height modification.
