dumb ddm dom question

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That's new to me I didn't know it had one. That most likely is going to be a drain. If you look at how the pipe sits when mounted the tip would collect moisture and oil. You could remove the screw to drain it out.
 
Yep it's to drain the excess oil. I had to put some RTV sealant on that screw when I first got it because I found that it was spitting oil on the front a-arm while running.
 
If the pipe is on during break in or any time your running rich, you will get quite a bit of oil in it.
 
Deluge said:
If I remember correctly, it's to help make the chroming process easier. Could use it to clean the pipe, though.
Do the black versions not come with the screw?
 
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