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Koni Sport Rear Shock Absorber - 8241-1305S

Koni Sport Rear Shock Absorber - 8241-1305S

The Koni Sport Shock Absorber controls suspension movement through performance-focused damping. Fe...

Best current price£189.72from Demon Tweeks

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Demon TweeksKoni Sport Shock Absorber - Top Adjustable Rear
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£189.72
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eBayKoni Sport Rear Shock Absorber (Top Adjustable) Fits Fiat / Mazda, (8241-1305S)
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Product Information

Full details

The Koni Sport Rear Shock Absorber (8241-1305S) is designed for driving enthusiasts who own a Fiat 124 Spider or Mazda MX-5/Miata and seek improved suspension precision. It provides a significant upgrade in handling and vehicle stability by controlling damping forces during spirited driving, though it requires individual purchase as each unit is sold separately.

All features

Model Part Number8241-1305S
BrandKoni

Extended Product Information

FAQs

Are these shocks sold as a set?

No, the Koni Sport shock absorbers are sold individually. You will need to purchase two units to cover the rear axle.

Can I use these with stock springs?

Yes, these shocks are fully compatible with both standard factory springs and aftermarket lowering springs up to 40mm.

Do I need to remove the shock to adjust the rebound?

On most vehicle applications, the external adjustment mechanism allows for tuning while the shock is installed on the vehicle.

Which car models are compatible with this part?

This unit is compatible with the Fiat 124 Spider and the Mazda MX-5/Miata series.

What is the benefit of adjustable rebound?

Adjustable rebound allows you to control how quickly the shock extends after compression, letting you balance road-holding performance with ride comfort.

Troubleshooting

Difficulty adjusting rebound settings

Ensure the external adjustment knob is fully seated and free of road debris before attempting to turn.

Increased noise over bumps

Check all top mount and lower mounting bolt torques to ensure they have not loosened over time.

Uneven vehicle ride height

Verify that your springs are seated correctly in the perches and that both shocks are set to the same damping level.

Pros and Cons

Pros

  • External rebound adjustment for quick tuning
  • Improved vehicle handling and cornering precision
  • Compatible with both stock and lowered springs
  • Durable, performance-oriented internal construction

Cons

  • Sold as individual units, not in pairs
  • May require manual adjustment to find desired settings
  • Performance-focused damping may be firmer than stock comfort levels

Setup, Compatibility & Care

This shock absorber is a direct fit for the rear suspension of the Fiat 124 Spider and the Mazda MX-5/Miata. It is engineered to accommodate ride height drops between 35-40 mm without compromising internal damping performance. During installation, ensure the mounting hardware is torqued to the manufacturer's specified values. Since these are high-performance units, periodically check for signs of fluid leaks around the seal area and ensure the adjustment mechanism is kept clean and free of debris to maintain ease of use.

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