Cat code: 970582

Bosch 521 Super 4 Spark Plug x4

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Bosch 521 Super 4 Spark Plug x4

Bosch 521 Super 4 Spark Plug

Featuring a unique state of the art design, the Bosch 521 Super 4 Spark Plug results in improved engine smoothness and acceleration.

Bosch 521 Super 4 Spark Plug Extra Info

  • Superior engine versatility
  • Electrode gap adjusted ex factory
  • Noticeable improvement in acceleration
  • Significantly improved engine smoothness

Additional Information

Please check with your vehicle manufacturer or workshop manual to confirm the suitability of this part for your vehicle.

How can I get it?

Click & Collect

Delivery available

Choose your delivery day from £4.99

Some of the parts we sell here at Halfords have been reconditioned. These will carry a Refundable Deposit or an extra surcharge amount. When you add one of these reconditioned items to your basket, we'll add this extra cost automatically.

Once you've sent us your old item we'll check it over, and then refund you the full surcharge as long as everything is ok.

Before you return your old unit please make sure it's in re-serviceable condition. So if you're returning caliper casings, you'll need to double check they aren't badly damaged or broken. If the part you've sent is found to be unserviceable, we reserve the right not to refund the surcharge.

Please note that if you're returning your old unit to our National Returns Centre then this will be at your own expense.

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Bosch Spark Plugs

Bosch 521 Super 4 Spark Plug x4

£21.49 The Bosch 521 Super 4 Spark Plug helps improve your acceleration and engine smoothness.