BC Racing ZX Series Coilovers BMW M3 G80 RWD 2021+ – I-103-ZX
Upgrade your **BMW M3 G80 RWD** with the **BC Racing ZX Series Coilovers I-103-ZX**, developed for demanding track, motorsport and performance applications.
Key Features:
- True 3-way adjustable damping
- High-speed & low-speed compression adjustment
- Independent rebound adjustment
- Monotube dual-piston damper design
- External reservoirs for increased oil capacity
- Adjustable ride height
- Front camber adjustment
- Choice of 6/14, 12/14 or 9/16 kg/mm spring rates
- Designed for BMW M3 G80 RWD
BC Racing Kit: I-103-ZX
Variation SKUs: 0071711 / 0029254 / 0081381
Delivery & Return
We aim to dispatch orders as quickly as possible using reliable UK courier services. Delivery times can vary depending on stock availability, supplier location and the type of product ordered.
Estimated delivery times are shown where available, but these should be treated as a guide rather than a guaranteed delivery date.
Some specialist, made-to-order, imported or supplier-direct performance parts may take longer to arrive. If you need a part by a specific date, we recommend checking availability before ordering.
Once your order has been dispatched, tracking information will be provided where available.
UK Delivery
We deliver throughout the United Kingdom.
Shipping charges are calculated at checkout based on the size, weight and destination of your order. Larger or heavier items may have an additional delivery charge.
Deliveries to the Scottish Highlands, Northern Ireland, Isle of Man, Isle of Wight, Channel Islands and other remote locations may take longer or incur additional charges.
International Delivery
International shipping may be available for selected products and destinations.
Import duties, taxes, customs charges and local handling fees are the responsibility of the customer unless stated otherwise. These charges are not included in the product price or standard shipping cost.
Please check your local import requirements before placing an international order.
Incorrect, Damaged or Faulty Items
Please inspect your order as soon as it arrives.
If your item is damaged in transit, faulty or different from what you ordered, contact us as soon as possible with your order number and clear photographs where relevant.
We will review the issue and advise you of the appropriate next steps.
Vehicle Fitment & Compatibility
It is the customer’s responsibility to check that a product is suitable for their vehicle before installation.
Please verify the vehicle model, year, engine, chassis code, part number and any relevant brake, suspension or drivetrain specification before ordering.
If you are unsure about compatibility, contact us before purchase with your vehicle registration or VIN and the product SKU where possible.
We cannot accept responsibility for incorrect fitment caused by inaccurate vehicle information, non-standard modifications or aftermarket conversions that were not disclosed before purchase.
Special Order & Made-to-Order Products
Some performance parts are specially ordered, imported, customised or manufactured specifically for a customer.
These products may be subject to different cancellation and return conditions. Where applicable, this will be confirmed before the order is processed.
Refunds
Approved refunds are normally issued back to the original payment method after the returned item has been received and inspected.
Original delivery charges and return postage may not be refundable unless the item is faulty, damaged or supplied incorrectly.
Please allow time for your bank or payment provider to process the refund after it has been issued.
Need Help?
If you have any questions about delivery, returns or product compatibility, please contact Performance Car Parts UK before ordering. We will be happy to help you check product details and fitment information.
BC Racing ZX Series Coilovers for BMW M3 G80 RWD
Take control of your BMW M3’s suspension setup with the BC Racing ZX Series Coilovers for BMW M3 G80 RWD. Designed for serious performance driving, track use and motorsport applications, the ZX Series provides substantially more suspension tuning capability than a conventional road-orientated coilover system.
The I-103-ZX kit combines adjustable ride height with true three-way damper adjustment, allowing the suspension to be fine-tuned to suit different tyres, circuits, road surfaces and driving styles.
Available with three spring-rate configurations, you can select the setup that best matches your intended use.
True 3-Way Adjustable Damping
The BC Racing ZX Series gives the driver independent control over three important areas of damper behaviour:
- 30-click rebound adjustment
- 20-click low-speed compression adjustment
- 12-click high-speed compression adjustment
This gives experienced drivers and suspension technicians considerably more control over vehicle balance than a conventional single-adjustable coilover.
Low-speed compression adjustment can be used to influence chassis behaviour during braking, acceleration and cornering, while high-speed compression controls damper response to faster suspension movements such as kerbs, bumps and surface changes.
Rebound adjustment allows further control over how quickly the suspension extends after compression.
Designed for Track & Motorsport Use
The BC Racing ZX coilovers for BMW M3 G80 are aimed primarily at drivers who require a high level of suspension adjustability for circuit driving, drifting and other performance applications.
The ZX design incorporates an external reservoir, increasing the available damper-fluid capacity and helping the suspension maintain more consistent performance during prolonged hard use.
A monotube, dual-piston damper arrangement and high-viscosity synthetic racing damper fluid are used to provide consistent damping characteristics under demanding conditions.
Adjustable Ride Height
Ride height can be adjusted to achieve the required stance and suspension setup for your BMW M3 G80.
Correctly setting ride height can help optimise:
- Vehicle centre of gravity
- Cornering response
- Weight transfer
- Wheel and tyre clearance
- Track-focused chassis setup
Following installation and ride-height adjustment, a professional four-wheel alignment is strongly recommended.
Three Spring Rate Options
This BC Racing I-103-ZX application is available with three spring-rate configurations.
6/14 kg/mm – SKU 0071711
Front: 6 kg/mm | Rear: 14 kg/mm
The 6/14 kg/mm configuration is the recommended baseline spring-rate option for this application and provides a useful starting point for performance and track setups.
12/14 kg/mm – SKU 0029254
Front: 12 kg/mm | Rear: 14 kg/mm
A substantially stiffer front spring configuration for applications requiring increased front-end support. This may suit vehicles running more aggressive track setups, higher grip levels or configurations where reduced suspension movement is required.
9/16 kg/mm – SKU 0081381
Front: 9 kg/mm | Rear: 16 kg/mm
This alternative configuration combines an increased front spring rate with an even higher rear spring rate and provides another tuning option for specialised performance setups.
Spring rate selection should be based on the vehicle’s weight, tyres, alignment, aero package and intended use rather than simply choosing the stiffest available option.
BMW M3 G80 RWD Fitment
The I-103-ZX application is intended for compatible BMW M3 G80 rear-wheel-drive models from 2021 onwards.
The same underlying BC Racing application is also listed for compatible BMW M2 G87 RWD and BMW M4 G82 RWD vehicles, but drivetrain specification must always be checked before ordering.
This product should not be assumed to fit BMW xDrive models.
Why Choose BC Racing ZX Coilovers?
- Premium track-focused BC Racing suspension
- Independent 3-way damping control
- 30-click rebound adjustment
- 20-click low-speed compression adjustment
- 12-click high-speed compression adjustment
- External damper reservoirs
- Monotube construction
- Dual-piston damper system
- Adjustable ride height
- Front camber adjustment on applicable configuration
- Multiple spring-rate options
- Fully rebuildable design
- Developed for high-performance and motorsport use
Professional Installation Recommended
Due to the adjustment range available with the ZX Series, professional installation and suspension setup are recommended.
After installation, the vehicle should undergo a full wheel alignment. Cars intended for track use may also benefit from professional corner weighting and damper setup to make full use of the ZX Series adjustment range.
If you are unsure which spring-rate option is appropriate for your BMW M3 G80, select your configuration based on the vehicle’s intended use rather than spring stiffness alone.
Technical Specification
<div class="pcp-spec-wrap">
<div class="pcp-spec-card">
<h3>Technical Specification</h3>
<div class="pcp-spec-grid">
<div class="pcp-spec-row">
<span class="pcp-spec-label">Brand</span>
<span class="pcp-spec-value">BC Racing</span>
</div>
<div class="pcp-spec-row">
<span class="pcp-spec-label">Series</span>
<span class="pcp-spec-value">ZX Series</span>
</div>
<div class="pcp-spec-row">
<span class="pcp-spec-label">Master / Parent SKU</span>
<span class="pcp-spec-value">I-103-ZX</span>
</div>
<div class="pcp-spec-row">
<span class="pcp-spec-label">Product Type</span>
<span class="pcp-spec-value">3-Way Adjustable Coilover Suspension Kit</span>
</div>
<div class="pcp-spec-row">
<span class="pcp-spec-label">Damper Construction</span>
<span class="pcp-spec-value">Monotube</span>
</div>
<div class="pcp-spec-row">
<span class="pcp-spec-label">Reservoir Type</span>
<span class="pcp-spec-value">External Reservoir</span>
</div>
<div class="pcp-spec-row">
<span class="pcp-spec-label">Rebound Adjustment</span>
<span class="pcp-spec-value">30-Click Adjustable</span>
</div>
<div class="pcp-spec-row">
<span class="pcp-spec-label">Low-Speed Compression</span>
<span class="pcp-spec-value">20-Click Adjustable</span>
</div>
<div class="pcp-spec-row">
<span class="pcp-spec-label">High-Speed Compression</span>
<span class="pcp-spec-value">12-Click Adjustable</span>
</div>
<div class="pcp-spec-row">
<span class="pcp-spec-label">Ride Height Adjustment</span>
<span class="pcp-spec-value">Yes</span>
</div>
<div class="pcp-spec-row">
<span class="pcp-spec-label">Front Camber Adjustment</span>
<span class="pcp-spec-value">Yes, where applicable</span>
</div>
<div class="pcp-spec-row">
<span class="pcp-spec-label">Drivetrain</span>
<span class="pcp-spec-value">Rear-Wheel Drive (RWD)</span>
</div>
</div>
<h4>Available Spring Rate Variations</h4>
<div class="pcp-table-scroll">
<table class="pcp-fitment-table">
<thead>
<tr>
<th>Variation SKU</th>
<th>Front Spring Rate</th>
<th>Rear Spring Rate</th>
</tr>
</thead>
<tbody>
<tr>
<td>0071711</td>
<td>6 kg/mm</td>
<td>14 kg/mm</td>
</tr>
<tr>
<td>0029254</td>
<td>12 kg/mm</td>
<td>14 kg/mm</td>
</tr>
<tr>
<td>0081381</td>
<td>9 kg/mm</td>
<td>16 kg/mm</td>
</tr>
</tbody>
</table>
</div>
<div class="pcp-spec-note">
<strong>Important:</strong> Spring-rate choice should be matched to vehicle setup, tyre choice and intended road or track use. Professional installation, wheel alignment and suspension setup are recommended.
</div>
</div>
</div>
Vehicle Fitment
<div class="pcp-spec-wrap">
<div class="pcp-spec-card">
<h3>Vehicle Fitment</h3>
<div class="pcp-table-scroll">
<table class="pcp-fitment-table">
<thead>
<tr>
<th>Year</th>
<th>Make</th>
<th>Model</th>
<th>Chassis / Submodel</th>
<th>Engine</th>
<th>Drivetrain</th>
</tr>
</thead>
<tbody>
<tr>
<td>2021+</td>
<td>BMW</td>
<td>M3</td>
<td>G80</td>
<td>3.0L S58 Twin-Turbo</td>
<td>RWD</td>
</tr>
<tr>
<td>2021+</td>
<td>BMW</td>
<td>M4</td>
<td>G82</td>
<td>3.0L S58 Twin-Turbo</td>
<td>RWD</td>
</tr>
<tr>
<td>2023+</td>
<td>BMW</td>
<td>M2</td>
<td>G87</td>
<td>3.0L S58 Twin-Turbo</td>
<td>RWD</td>
</tr>
</tbody>
</table>
</div>
<div class="pcp-spec-note">
<strong>Fitment Note:</strong> This BC Racing I-103-ZX kit is intended for compatible rear-wheel-drive applications. It should not be assumed to fit xDrive / AWD models. Always confirm chassis, drivetrain and spring-rate specification before ordering.
</div>
</div>
</div>
| Weight | 24.000000 lbs |
|---|
Delivery & Returns
UK Delivery
We deliver throughout the United Kingdom using reliable courier services. Delivery times vary depending on stock availability, supplier location, product size and destination.
Shipping charges are calculated at checkout where applicable. Larger, heavier, specialist or supplier-direct items may incur additional delivery charges.
Dispatch Times
We aim to dispatch in-stock products as quickly as possible. Some specialist, imported, made-to-order or supplier-direct performance parts may require additional processing time.
If you require a product by a specific date, please contact us before ordering so availability can be checked.
Tracking
Tracking information will be provided where available once your order has been dispatched.
International Delivery
International shipping may be available for selected products and destinations. Import duties, taxes, customs charges and local handling fees are normally the responsibility of the customer unless otherwise stated.
Returns
Please contact us before returning an item. Products should be returned in accordance with our returns policy and in suitable condition where applicable.
Special-order, made-to-order, customised or imported products may be subject to different cancellation and return conditions.
Damaged, Faulty or Incorrect Items
Please inspect your order as soon as it arrives. If an item is damaged, faulty or different from what you ordered, contact us promptly with your order number and clear photographs where relevant.
Vehicle Fitment
It is the customer’s responsibility to confirm product compatibility before installation. If you are unsure, contact us with your vehicle registration or VIN and the product SKU before ordering.
