I've e-mail the people and just to see what's up..

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Thank you for your inquiry.

The 9006ST has a 90 degree angle base. The 9006XSST has a straight base with no
angle in it. You should use the version of this bulb that is recommended for
your vehicle.

Please let me know if you have any additional questions.

Thank you,
Lise Boisvert
OSRAM SYLVANIA
Automotive Lighting


COMMENTS: (e-mail I sent to them)
Hi, I am Looking forward to buy some new light
bulbs, and I am very interested in SilverStar 9006. And I see that there is 9006
ST and 9006XS ST, what is the difference? Thanks in Advance.
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So, my another question is..what is the real difference between the ST and XSST? Which one do you use? Why?
And one have that cupon?(10 dolla rebate? off?)
Thanks agian!

P.S. I was thinking aboutthe 9005 convertion, but I just figured I don't want to mess around with the lights so much, just looking for cheap look good works good kind of deal..so i's SilverStar