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What is the Difference Between OPT7 9006 and OPT7 9006XS Headlight Bulbs?

The difference between the 9006 and the 9006xs bulbs is the type of base the light has. A 9006 size bulb will have a 90 degree angle base, such as the part below. 

 

While a 9006xs bulb will have a straight base to plug into, the one below:

 

 

 

 

 

A picture that will show the difference in the two bulbs in comparison between the two side by side is below.

 



A 9006 bulb and a 9006XS bulb will fit different vehicles, so you will need to check your owners manual or your current bulb size for the correct bulb that you will need.