
XYZ Racing Street Advanced Coilovers — BYD DOLPHIN 2021-2026
SKU: BY04-SA
- IncludesFull set of 4 (front + rear)
- Spring rate (F/R)16 / 3 kg/mm
- Top mountHardened rubber / OE (factory) mount
- Lead time10–15 working days
Fits Byd DOLPHIN (2021-2026) chassis BY04
Added to basket ✓

The Dolphin’s blade battery sits flat in the floor, so the BY04 carries a low centre of gravity but close to a tonne and a half of kerb weight pressing on dampers tuned for comfort first. On the standard setup that mass shows up as float over crests and lazy roll into a roundabout, the body still settling after the tyres have already turned in. The XYZ Racing Street Advanced coilover for the Byd 海豚 Dolphin is the answer that keeps the everyday ride EV owners actually want.
This is the road-and-light-track member of the XYZ range, built for owners who drive their Dolphin daily but want the chassis to feel like it is connected to the road rather than swimming above it. Height comes down to close the heavy EV’s arch gap, and damping force is yours to set rather than fixed at the factory’s soft compromise.
What this coilover does for your 2021-2026 Byd 海豚 Dolphin
Drop the ride height and you pull the Dolphin’s visual mass down over the wheels and lower the roll couple that the tall hatch body fights against. The 720 increments of damping adjustment let you run the car plush for a motorway commute, then firm the front to stop the nose diving when you brake into the heavy regen-and-friction transition this EV is known for. Turn-in gets crisper because the dampers now control the battery mass instead of reacting to it, and mid-corner the Dolphin holds a line rather than leaning on its outside front tyre. You feel it most in quick direction changes, where the standard car wallows and this setup stays composed.
About the Street Advanced coilover
Street Advanced is the most popular kit in the XYZ catalogue, refined over years by the company’s engineering team and validated in international race use before reaching production. It is built specifically for normal road driving with the option of the occasional track day, so the priority is breadth rather than outright stiffness. The headline figure is 720 ways of damping adjustment across a single dial, which moves bump and rebound together to suit how you actually use the car. Construction follows XYZ’s proven coilover layout with height adjustment independent of damper travel, so you can sit the Dolphin lower without sacrificing the suspension stroke that keeps it usable on UK roads. For drivers chasing more speed and sharper control without giving up daily manners, this is the kit XYZ positions as essential equipment.
Fitment for the Byd 海豚 Dolphin (2021-2026)
This kit is matched to the BY04 chassis Byd 海豚 Dolphin across the 2021 to 2026 model years. It is a direct-fit application designed around the factory mounting points for this platform. Confirm your build year against the range above before configuring.
What buyers also search for
- Byd Dolphin coilovers for lowering a heavy EV hatch without harshness
- BY04 suspension upgrade that keeps daily comfort with adjustable damping
- Byd 海豚 Dolphin road and occasional track coilover setup
- 720-way adjustable coilover for the Byd Dolphin 2021-2026
- Byd Dolphin handling upgrade to cut body roll and float
Set your ride height and damping target, then configure your Street Advanced kit for the Dolphin below.
After tested in famous worldwide races, it reaches the ultimate quality and performance.
Street Advance is made especially for normal road use or track day. It comes with 720 damping adjusting way to satisfy your request. It is indispensable equipment for drivers aspiring speed and controlling.
Top mounts included with your kit
Every XYZ Racing coilover kit ships with the upper mounts listed below for your exact chassis — no extra parts to source.
Hardened rubberRHardened rubber upper — firmer than the factory bush for tighter response while retaining road-friendly noise and vibration isolation.
OE (factory) mountOERetains the OEM (factory) upper mount — preserves the original ride comfort, noise and vibration behaviour for a stock-like feel.
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