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gpthunders

  1. Technical Guides for the E36, E30 and E21
    Some may recall my recommendation to upgrade the stock yellow H1s for some GP Thunders as forums in the US were quite good on them. So I bought a set off the US ebay site for around 20 quid and chose 100 watt with 7500 K colour, white blue. To date in my high beams, I have been using a 55 watt...
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