H4 wiring harness upgrade

[dahondr98]

The kits which u mentioned seems quite expensive. Would there be any other kits from overseas that may be cheaper u rkn?

There are headlight wiring kits from overseas, mainly the USA, but after postage, I think they'd be a similar price, if not more. I checked out postage on one of the US rally light websites, and it was more than they wanted for the harness, putting the cost way over ANY of the Aussie harnesses, in Australian dollars! When you consider price, remember, based on my voltage testing (tertiary qualified in electrical engineering), and Hella's figures, the Aussie harnesses will double the brightness of any globes you have in your headlights, compared to the inadequate Honda wiring. That's TWICE as bright. And it's before you change any bulbs!

And as pointed out by Vinny, you can save plenty of money doing it yourself (making a wiring harness, that is).

I'm looking to run osram 65w rallye bulbs, although with a relay would be considering te 80w version. My Civic is aus spec but it seems to have a plastic headlight casing and not a glass one so it may melt the inside?

The 65W bulbs are OK for plastic headlights. 80W bulbs you may get away with, but personally, I wouldn't risk it (but then again, I'm a careful person!). 100W (and higher) is out of the question - it damages plastic lamps. If they are plastic and not glass, then don't risk higher than about 70W. Apparently Osram's 70/65W H4 rally bulbs work OK in plastic headlamps without damage, according to an overseas expert.