XYZ Racing Circuit Master Coilovers — Lexus IS 200t/250/300/300h/350 (XE30) (Modified Rear Integrated) (Front EYE) 2013-2026

The XE30 IS carries its weight low and rearward compared with its German rivals, and on a hybrid 300h that balance shifts again once the battery pack’s mass enters the equation. Circuit Master coilovers give this platform a suspension that can be set to match whichever IS you’re actually running, from the four-cylinder 200t to the V6 350, rather than a single compromise spring rate applied across the whole range.

This is a track-focused kit built for sustained lap-time work, not a fast-road compromise. On a chassis that spans four distinct powertrains and two body styles, that matters: the 200t’s turbo four loads the front axle differently to the 350’s naturally aspirated V6, and the coilover has to cope with both without retuning the car every time you switch driver or fuel load.

What this coilover does for your 2013-2026 Lexus IS

Circuit Master’s adjustment range lets you tune compression and rebound independently front and rear, which matters on the IS because the rear-integrated modified mounting on this application changes how load transfers into the rear subframe under trail braking. With 9720 possible damping combinations available through the kit’s knobs, you can set the front end firm enough to resist dive under the IS’s stock brakes while keeping the rear compliant enough to put power down out of slow corners. The monotube-style construction sheds heat more consistently than the factory dampers over a full track session, so damping force doesn’t fall away lap five when it mattered most on lap one. Ride height is adjustable independently of spring preload, so you can correct the IS’s stock rake and get the front splitter or lip closer to a usable ride height without touching spring rate.

About the Circuit Master coilover

Circuit Master sits at the top of XYZ Racing’s range, developed specifically for circuit and competitive use rather than road comfort. XYZ’s racing teams have used the platform in international competition, and the development work behind it shows up as 9720 distinct damping combinations across the kit’s three external adjustment knobs, giving a genuinely wide window between a stiff qualifying set-up and a more usable trackday tune. The knobs meter damping oil through a small internal passage; on rough or broken surfaces that can produce a faint noise from the damper body, which is a normal characteristic of this valving design and not a fault. XYZ built the kit around circuit-surface use specifically, so the noise it can occasionally make over expansion joints or kerbs isn’t something to be concerned about on track. Construction and valving are shared across the platform-specific kits, with spring rates and mounting hardware adapted to each application – in this case the Lexus IS’s Rr Integrated mounting and Frt EYE front top mount configuration.

Fitment for the Lexus IS (2013-2026)

This kit is built for the XE30-chassis Lexus IS, covering 200t, 250, 300, 300h and 350 variants across the 2013-2026 production run. It uses the modified rear-integrated rear mounting and Frt EYE front top mount specified for this application, so confirm your IS matches this rear mount configuration before ordering rather than assuming it carries over from an earlier XE30 revision.

What buyers also search for

• Lexus IS XE30 coilover upgrade for track day and circuit use
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• XE30 IS suspension setup that works across 200t, 250, 300 and 350 variants
• Lexus IS ride height and damping adjustment for circuit driving
• IS300h suspension upgrade accounting for hybrid weight distribution

Pick the spec that matches your IS variant and configure yours below.