Product Details
BC Racing ZX Series Coilovers for the 1998-2005 Lexus GS300 (JZS160/JZS161) bring the same three-axis adjustability as the race-spec ZR Series with valving tuned for drivers who split time between street and track. Every kit is extensively tested on the GS300 chassis and refined until it balances ride quality with performance — the reason GS300 coilovers from BC Racing are the best-selling adjustable kits in their segment worldwide.
ZX Series kits share the three-axis damper architecture of the race-spec ZR Series, tuned out of the box for drivers who want race-grade adjustability without the ride harshness on the commute home. The off-the-shelf setup from BC Racing is deliberately balanced — spring rates and valving chosen so the kit feels comfortable day-to-day without giving up performance when you push it. Drivers who want a different recipe can spec Swift Springs, custom spring rates, or fully custom valving at checkout; BC will tune the dampers to match, which is a depth of customization most brands only offer on their top-tier kits.
Since 2004, BC Racing has grown into one of the most trusted names in aftermarket coilovers — not by racing to the bottom on price, but by pairing that price with real build quality, deep customization options, and a damper design any suspension shop can rebuild instead of replacing. These GS300 coilovers arrive tuned for the GS300 chassis and ready to bolt in — no break-in period, no guessing at setup. Every kit ships with a 2-year manufacturer warranty, lifetime access to BC service parts (pistons, seals, shafts — no unit replacement required when it's time for a rebuild), and in-house tech support from both BC Racing and the Springrates team.
Features
- 30-level rebound adjustment
- 15-level low-speed compression adjustment
- 12-level high-speed compression adjustment
- Inverted mono-tube damper with linear twin-piston design
- Ride height adjustable independent of spring preload
- Upper mount hardware varies by chassis — camber plates, pillowball, or reused OEM mounts. See the Specifications table for what's included on your kit.
- Swift Spring and custom spring rate upgrades available at checkout
- Custom damper valving paired with custom spring rates on request
- Fully rebuildable — replacement parts available from BC for the life of the shock
- 2-year manufacturer warranty against defects
Specifications
| Part Number | R-03-ZX |
| Part Name | ZX Series Coilovers |
| Vehicle | 1998-2005 Lexus GS300 RWD (JZS160/JZS161) |
| Drivetrain | RWD |
| Chassis Code | JZS160/JZS161 |
| Damping Adjustment | 3-Way (30 levels rebound 15 LSC 12 HSC) |
| Ride-Height Adjustable | Yes |
| Spring Rate - Front | 10 kg/mm |
| Spring Rate - Rear | 8 kg/mm |
| Spring Size - Front | 62-200-10K |
| Spring Size - Rear | 62-220-8K |
| Swift Springs - Front | 62-203-X |
| Swift Springs - Rear | 62-228-X |
| Camber Plates - Front | Not Applicable |
| Camber Plates - Rear | Not Applicable |
| Suspension Design - Front | True Coilover |
| Suspension Design - Rear | True Coilover |
| Notes | The ZX Series is not available in Extreme-Low configuration. |
Vehicle Fitment
- 1998 Lexus GS300 RWD (JZS160/JZS161)
- 1999 Lexus GS300 RWD (JZS160/JZS161)
- 2000 Lexus GS300 RWD (JZS160/JZS161)
- 2001 Lexus GS300 RWD (JZS160/JZS161)
- 2002 Lexus GS300 RWD (JZS160/JZS161)
- 2003 Lexus GS300 RWD (JZS160/JZS161)
- 2004 Lexus GS300 RWD (JZS160/JZS161)
- 2005 Lexus GS300 RWD (JZS160/JZS161)