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Basically Stock
2009 GS Turbo. 2006+2007 GT
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If it's at all going to be functional, make sure it's mounted to the chassis not the bumper. A functioning front splitter will very easily rip a front bumper off


Without any sort of air dam, I think it'll just add to engine bay pressure (adding lift at the front/middle of the car, and reducing cooling). But you never know for sure.
 

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Basically Stock
2009 GS Turbo. 2006+2007 GT
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6,054 Posts
Looking good! If you want any function, make a bit of an air dam between the bumper and the splitter, and remove that other splitter like thing you have

Also, be sure to either have venting from the undertray, or through your hood/fenders, or else you'll run into high pressure on both sides of the radiator, aka, no flow (stock design is pretty bad for flow as is)
 

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Discussion Starter #9 (Edited)
Looking good! If you want any function, make a bit of an air dam between the bumper and the splitter, and remove that other splitter like thing you have

Also, be sure to either have venting from the undertray, or through your hood/fenders, or else you'll run into high pressure on both sides of the radiator, aka, no flow (stock design is pretty bad for flow as is)
Are talking about removing the oem one? Or the aftermarket one? It does look cool with just the bumper, oem lip, and abs splitter also. Im gonna make slits in the undertray, I have vents in my cf hood already so that should be enough for airflow. What kind of air dam are you talking about

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Basically Stock
2009 GS Turbo. 2006+2007 GT
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6,054 Posts
It's ugly here, but the white part.



What they do is create the high pressure air that then pushes down on the splitter


And since you have hood vents, IF THEY ARE FUNCTIONAL, you won't need or WANT venting under the car, as that raises the pressure under the body. Underbody venting is only for what you have a proper extractor setup and need the extra cooling flow, usually taken from the front wheel area (where brake cooling ducts add extra pressure, which our cars don't come with)
 

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Discussion Starter #18
If you could at least block off the holes in the lip, and seal the bumper to the splitter, then you'd see function instead of just added drag
So 3 days in and I gotta tell you, I don't feel any drag, actually it feels alot smoother on the highway. Clearance is fine as well. All 3 piece's including the bumper are bolted together and yes I did use threadlocker loctite on the bolts. This is just the start, I plan on modding it more as I see fit, thx for the input.

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Discussion Starter #20
Lip is holding up fine, I thought clearance would've been an issue but I've been driving lowered cars for about 20 years so its not. Gonna lift the car in the next couple days to check on the brackets hold it to the frame, make sure everything is still solid.


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