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2016 Kona Blue ST3
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Nothing. RS headlights are the same dimensions, shape, etc. as 15+ ST's. They'll bolt right in.

If you have an ST1 though, you'll need more than just the headlights. If you have an ST2 or ST3... there's no point. RS heads are the same.
 

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Yeah. I have the ST1. I'm getting the RS headlamps for free though.


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You'll need the ballasts and whatnot for the HIDs then. And I believe you'll need a program like FoCCCus to enable the HID setting in the car's computer, otherwise they won't work properly and you'll throw codes.
 

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Then you should have everything you need. Although, I'm not sure if you'll have the adaptive lighting/cornering lamp functionality of the RS lights. Maybe it's something you can enable in the car's computer since the ST3 has the same functionality, but I don't know any details about that.
 

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Discussion Starter · #7 ·
Then you should have everything you need. Although, I'm not sure if you'll have the adaptive lighting/cornering lamp functionality of the RS lights. Maybe it's something you can enable in the car's computer since the ST3 has the same functionality, but I don't know any details about that.
Alright well thanks for the help


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2017 Ford Focus ST
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@PGxSaint How did this go? I have a set of RS headlights i want to buy for my ST1. Did u have to do any programming like Mazui said?
 
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