VIP1

Both the housings and bulbs are different. The glass is formed differently and the bulb in the 4701 is a higher wattage unit with no black paint on the tip. The bulb is also rotated 90*. I've dissected them both to make my own housings and some experimenting.

Here two good threads of interest on HIDs and projectors for the 1998-2002 Firebird:
https://ls1tech.com/forums/appearance-detailing/620634-firebird-projector-headlights.html
https://ls1tech.com/forums/appearance-detailing/623222-ok-what-s-best-hid-s-out-there.html

Here is some more good reading:
https://ls1tech.com/forums/appearance-detailing/605499-another-headlight-brights-question.html
https://ls1tech.com/forums/appearance-detailing/624972-serious-discussion-hids-long.html
https://ls1tech.com/forums/appearance-detailing/605521-brighter-bulb.html
https://ls1tech.com/forums/appearance-detailing/468948-real-hid-t-lights.html
https://ls1tech.com/forums/appearance-detailing/613458-post-up-your-hid-s.html
https://ls1tech.com/forums/wiring-stereo-electronics/452033-trans-am-headlight-replacement-options.html
https://ls1tech.com/forums/showpost....76&postcount=5

1meantransam

iTrader: (8)

ok well thanks for all the help im going to go with that 350 conversion, thanks

Blacker

iTrader: (3)

Good luck and you will love them.