Tein S-Tech Lowering Springs 2006 & up Lexus IS350 6cyl. 3.5I 2WD Drops 1.6fr and 1.2rr Product Model: TE-SKL90-AUB00 Tein S-Tech spring is an excellent step towards suspension tuning. It offers approximately a 1.5 inch drop for a stylish look and increased road capability.. All applications has been road tested in the US for proper balance between performance and comfort. This line of Tein S-Tech is produced with Vanadium, which is durable, lightweight, and designed to retain more spring stroke.