SPL Rear Knuckle Bushing Kit for Mazda MX-5 ND

£828.22 inc. VAT

Available to order — usually ships in under 3 weeks

The Rear Knuckle Bushing Kit for the ND Miata provides you with a smooth articulating, deflection and compliance-eliminating solution to take all of the “street-car” mushiness out of the rear of your suspension.

The rear knuckle bushings in the ND Miata are rubber-injected bushings with metal sleeves in them. While this does provide for a compliant ride, this is not what you desire when you are pushing the vehicle to its limits.

When pushing the car to the limit, the OEM bushings will bind and deflect causing unwanted changes to your alignment as your round corners, making it difficult to hold the car at peak grip.

Replacing with a full spherical solution will eliminate all artificial spring rate and mushiness from the rear of your suspension, and allow the car you to drive the tires to their full potential grip.

4 bushes per kit. Two kits needed per car.

Additional information

Shipping Weight 2000 kg
Shipping Dimensions 18 × 25 × 5 cm




Mk4 (15-24)

Warranty information

Warranties cover defects in materials and workmanship only. Warranty is for replacement of a similar product, repair of the original product or refund of the purchase value only and excludes all labour and incurred charges including towing, fitting, inconvenience, and purchases of other manufacturer's products. The warranty is good for the period stated in the additional info tab from the date of purchase. Mileage warranties are for road use only and proof of mileage is required. Products must be installed by an independent experienced professional mechanic and the suspected defect must be present at the outset. The warranty does not cover damage caused by incorrect installation, failure to comply with the maintenance requirements of the vehicle, processing or otherwise changing the product, ordinary wear and tear, or any other external influences. Warranties are invalid if the product is used for racing, rallying, drifting, track days or any other form of motorsport or competition. Please refer to the manufacturer's own warranty documentation for more information.

Making a warranty claim

Proof of purchase receipt showing the date of purchase, proof of mileage at installation, proof of current mileage and invoice of the work undertaken by an independent experienced professional mechanic must be supplied along with the returned products for a warranty claim to be considered. If your vehicle needs to be used whilst your warranty claim is considered replacement parts from the same manufacturer should be purchased through BOFI Racing. In the event of a successful warranty claim, we will refund the card that was originally used to purchase the replacement parts, in full or in part depending on the nature of the claim. BOFI Racing reserves the right to make full or partial compensation at its sole discretion depending on the condition and mileage use of the returned suspect parts. For example, if you have used the part for several thousand miles before a defect is noticed, only partial compensation may be offered.

Make Model Year
Mazda MX-5 IV (ND) 2015 - 2023

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