As you say illegal, but if you purchase and fit the excellent H4 LED’s from Classic Car LED’s Ltd you will get a light that has a better cut-off and light pattern than any halogen bulb, which my MOT tester was very impressed with. He said there was no reason for them to fail an MOT as the light pattern and colour met the requirements. Just make sure as with any bulb halogen or LED that they are set up properly.
They are not cheap at £70 a pair, but I wouldn’t trust the cheaper eBay alternatives.
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