Tein SKQ74-S3B00 S.Tech Lowering Springs for 14-16 Lexus IS250/14-20 Lexus IS350

Vehicle Fitment

• 2014-2016 Lexus IS250 (GSE30L; 2.5 L V6, RWD, Base/F-Sport)
• 2014-2016 Lexus IS200t (ASE30L; 2.0 L turbo I4, RWD, Base/F-Sport)
• 2014-2020 Lexus IS350 (GSE31L; 3.5 L V6, RWD, Base/F-Sport)

Fitment Notes

• Lowering Height:
  IS250 / IS200t: Front ≈1.2" (30 mm); Rear ≈1.0" (25 mm)
  IS350: Front ≈1.4" (35 mm); Rear ≈1.0" (25 mm)
• Progressive-rate springs compatible with OEM or replacement dampers
• F-Sport trim: may need bump rubber trimmed as per Tein guidelines
• Not designed for AWD/4WD models

Features

• Progressive spring rates tuned for balance of comfort and sporty handling
• 6 kg/mm (~336 lb/in) front and 8.5 kg/mm (~476 lb/in) rear for IS250/IS200t
• 6 kg/mm front and 8.5 kg/mm rear for IS350, via calibrated progressive coil
• Chrome-vanadium steel with green epoxy finish
• Road-tested in North America with OEM damper compatibility
• Enhances cornering grip and reduces body roll while maintaining ride quality
• Tuned lowering harmonics--no ride harshness typical of flat-rate springs
• Sold as full 4-spring set with full manufacturer's warranty

Specifications

• Part Number: SKQ74-S3B00
• Material: Chrome-vanadium SAE9254V progressive spring steel
• Front Drop IS250/IS200t: -1.2"; IS350: -1.4"
• Rear Drop all: -1.0"
• Front Rate: 6 kg/mm (~336 lb/in)
• Rear Rate: 8.5 kg/mm (~476 lb/in)
• Finish: Green epoxy coat

Included Components

• 2x Front progressive lowering springs
• 2x Rear progressive lowering springs
• Installation and spring trimming guidelines

Product Description

The Tein SKQ74-S3B00 S.Tech lowering springs offer a stylish stance and dynamic driving feel for 2014-2020 Lexus IS250, IS200t, and IS350 RWD models. Front and rear progressive springs lower the ride height by approximately 1.2"/1.4" front and 1.0" rear depending on engine and chassis, while maintaining balanced ride quality.

Constructed with chrome-vanadium steel and green epoxy coating, these springs offer durability and corrosion resistance. Special attention for F-Sport trims includes trimming bump stops to prevent coil binding as described in Tein's fitment notes. Ideal for enthusiasts seeking improved handling without sacrificing daily comfort.