THEy are much cheaper than having to buy the silvia projector lights, and get that projector look. Get some piaa super spark blue bulbs and get hid look.
They fit right into the oem housing no modes to make. cheaper than having to pay $1000.00 to convert into a silvia front end, but then again that front ends look way better.
they look the same...i have them on my car. but i got them to allow me to use brighter(whiter) bulbs...you can use any h4 bulbs when you convert the sealed beams to these...i used the hella units
the hella units and new bulbs ran me close to $100. really worth it IMO!:D