XYZ Racing Circuit Master Coilovers — Lexus GS 300/400 (S160) 1998-2005

The S160 GS arrived with a chassis that was always more capable than its luxury brief demanded. Running either the 2JZ inline-six of the GS 300 or the 1UZ V8 of the GS 400, there is genuine rear-wheel drive balance in the platform – but the factory suspension was calibrated for long-distance comfort, and over 1,600 kg of Japanese luxury saloon makes itself felt quickly when the damping is no longer managing the body.

The XYZ Racing Circuit Master coilover for the Lexus GS 300/400 (S160) addresses that mismatch directly. Designed for sustained circuit lap-time work, it removes the comfort-biased factory damping and replaces it with a system you can configure around the S160’s specific weight distribution and your driving style.

What this coilover does for your 1998-2005 Lexus GS 300/400 (S160)

On the S160’s long-stroke suspension, the factory setup bleeds confidence the harder you push – particularly into high-load corners where the car’s weight begins to transfer early and the soft damping can no longer keep pace. The Circuit Master gives you direct authority over that movement. Its 9,720-combination adjustment range means you can manage the S160’s tendency to load the outside front tyre under heavy trail-braking, then reconfigure for the next session without starting from scratch. Height adjustability lowers the centre of gravity meaningfully on a car that sits at the heavier end of the FR performance class, improving roll resistance before the damper tuning even begins.

About the Circuit Master coilover

XYZ Racing positions the Circuit Master at the top of their competition range, alongside Racing Spec, Drift Spec, and Tarmac Rally variants. The specification has been developed and validated on international circuits by XYZ Racing teams, which shapes its design priorities: the calibration here reflects what actually happens at speed on a race circuit, rather than being a road-biased product with circuit credentials claimed after the fact.

The headline figure is 9,720 distinct adjustment combinations, generated by three separate knobs controlling different aspects of damper behaviour. The valving uses a small-oil-passage design that precisely meters fluid flow at circuit speeds. Buyers should note that this construction can produce a minor noise characteristic over large surface imperfections away from the circuit – this is normal behaviour from the high-performance valving and not a fault. The Circuit Master is optimised for smooth circuit surfaces, and the valving reflects that single-minded brief.

Fitment for the Lexus GS 300/400 (S160) (1998-2005)

This kit is confirmed for the second-generation Lexus GS on the S160 platform, spanning the full 1998 to 2005 production run. Both the GS 300 and GS 400 variants are covered – the 2JZ-GE straight-six and 1UZ-FE V8 share the same suspension architecture on the S160, with common mounting points across the range.

What buyers also search for

• Lexus GS 300 coilover kit for circuit use and track-day driving
• Lexus S160 suspension upgrade with independent compression and rebound adjustment
• GS 400 coilover to reduce body roll and sharpen trail-braking stability
• XYZ Racing Circuit Master Lexus GS 1998-2005 with 9720 ways of adjustment
• Lexus GS 300/400 height-adjustable coilovers for road-to-circuit conversion

The S160 platform has earned a quiet cult following among track regulars who understand what a properly set-up heavy FR saloon can do on a circuit. Specify your ride height and damper configuration against the S160’s requirements, then build yours below.