XYZ Racing Street Advanced Coilovers — BYD F6 2003-2007

The Byd F6 was BYD’s first proper crack at a D-segment saloon, and its long wheelbase and front-heavy layout give it a soft, slightly floaty ride straight from the factory – exactly the brief a coilover like the XYZ Racing Street Advanced was written for. This is the spec to fit when you want the F6 to sit lower, settle quicker over mid-corner bumps, and feel composed when you actually start leaning on it, without surrendering the daily-driver manners the car was sold on.

Street Advanced is XYZ’s enthusiast-street platform with track-day headroom. For an F6 owner, that translates to a saloon you can drop to a usable ride height, firm up for a B-road run, and soften back off for the motorway commute on the same hardware.

What this coilover does for your 2003-2007 Byd F6

Drop the F6 onto Street Advanced and the first thing you notice is body control – the nose stops diving under braking and the rear stops squatting when you load it up out of a roundabout. Ride height is fully adjustable on the threaded body, so you can dial out the factory arch gap without losing usable travel, which matters on a car this size where running out of stroke turns every speed bump into a crash. The 720-way damping range is the real reason to buy it: soft enough at the comfort end to keep the F6 civilised on broken UK tarmac, firm enough at the other end to stop it rolling onto its door handles when you push. Spring and damper work together to give the steering a directness the standard set-up never had, and the car finally feels like it’s responding to your inputs rather than catching up with them.

About the Street Advanced coilover

Street Advanced is XYZ Racing’s most popular kit and the one their engineering team has spent the longest refining, with the spec sheet shaped by feedback from worldwide race programmes that filtered back into a road-biased product. The headline number is 720 damping settings – one knob, bump and rebound moving together – which is enough granularity to find a setting for daily driving, a setting for a spirited Sunday, and a setting for a track day, then return to the first one on Monday morning. Construction is built around adjustable spring perches and pillowball top mounts on most fitments, with corrosion-resistant finishes for British winters. XYZ position the Street Advanced as the indispensable kit for drivers who want speed and control without giving up everyday usability, and that’s the brief it delivers against: a genuine fast-road coilover with enough adjustability to handle the occasional circuit session.

Fitment for the Byd F6 (2003-2007)

This kit is specified for the first-generation Byd F6 saloon, chassis BY03, covering production years 2003 through 2007. Confirm your model year and trim against your V5 before ordering, as wheel and tyre clearance at the lowest ride-height settings will depend on your existing wheel offset and tyre profile.

What buyers also search for

• Byd F6 coilover kit for road and occasional track use
• Byd F6 lowering kit with adjustable damping rather than fixed-rate springs
• Byd F6 suspension upgrade that keeps the car usable as a daily
• Street Advanced 720-way damping for the BY03 chassis
• Adjustable ride-height coilovers for 2003-2007 Byd F6 owners in the UK

Pick your spring rates, top-mount option and ride-height preference below, and build the Street Advanced spec for your F6.