whats the best way to put a 2 gauge pilar in my 1999 rs?

There is only one way.

I dont get what you mean? It should come with instructions.

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98 ESi
95 GS

To remove the stock part the pilar is going to replace all you need to do is expose a lip and start tugging firmly. There are 3 or 4 pop-in clips (can't rememeber) as you can see on the pillar pod. Yank on that sucker till it comes off.

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Star Stage 3
with no traction
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I just screwed my new pillar into the metal behind it and it turned out perfect.

95 eclipse RS

14.80 @ 94mph with no turbo