This auction is for 1 speaker pair (£ 16.18) to do one seat. If you want to do your whole car, you need 2 pairs (£ 32.36).
Remember, only one postage charge no matter how many speakers you buy.

Postage 

Second Class Standard,  Small Parcels within the UK, £ 2.85 (2 to 3 working days)

International Standard, Small Parcels within Europe, £4.05

International Standard, Small Parcels Worldwide, £5.10

Frequently Answered Questions:

What? These headrest speakers are the finest available. The same size as the originals, they are a direct replacement for the originals BUT these are more durable and produce a SUPERIOR audio output. 

Why? The paper cones on the original speakers can be worn or torn and this causes them to hiss and be quiet. I REPLACED the speakers in my own car (an import) with these speakers and the response is FANTASTIC now. These speakers have polymer cones and are rated at 8W peak power (originals were only 6W). They have a higher impedance (8 Ohms as Opposed to the 5 Ohm originals) So they filter any potentially damaging bass frequencies. 

Where? You will have headrest speakers in your car if you have wires under the seats. If you want to check exactly what you have, just fold back the seam around the top of the seat and unzip the headrest. Behind a plastic cover you should find the black boxes, speaker mounting and (with any luck) the wiring.

When? They fit straight into the mounting boxes and replace the originals. The immediate effect is audible Radio that you even get on the motorway. They are very robust and should suit any head-unit that you have fitted in your car.