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Hi. Can I use higher wattage H4 80/100w bulb?

Thanks.
 

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Yes but they might melt your wiring harnesses or sockets.
 

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You will most definetly melt your wiring/connector or pop the headlight circuit breaker(or fuse) running them for any length of time. To run high wattage bulbs you better wire in a relay cuircuit to be safe and use the factory wiring as the relay trigger power.
 
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