100/130 h4 headlight globes

[the evil twin]

Sorry to wake up old thread BUT do you have to upgrade loom or put relay in for the sealed beam 90/100 lights or will they run ok without any changes?

I would definitely upgrade the wiring loom and fit relays.
If you don't the stalk switch which is problematic with standard globes has to swallow all that extra current.
The voltage drop in the factory system with the extra current is usually enough to negate the improved wattage anyway.
Another thing to pay close attention to is the earth at the reflector plugs. I have seen several of these melt due to the heat of the extra current

Over the years I have tried almost every type of lighting in the GQ... HID, 90/100, 100/130, crystal etc etc
The best results I got (for me and the poor bugger coming the other way) were with relays and upgraded loom powering +100 Philips in the standard wattage.
I have not tried the later HID projector lens tho.

Plug and play looms are like $150 to $200 on Ebay which IMHO is a rip because all you need is relays, cimps and a few metres of wire BUT for a lot of people the premade looms are more convenient so fair enough in that regard I s'pose