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DIY: Better Looking OEM Rear Diffuser

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Old 03-25-2009, 04:50 PM
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i saw this an did it the other day it took no time at all
Old 04-24-2012, 10:42 AM
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...so after a few years, how has this been holding up?
Old 04-24-2012, 11:03 AM
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you could always do it the right way, with a dremel, hehehe.

https://www.rx8club.com/series-i-exterior-appearance-body-kits-27/3-hr-diy-rear-bumper-mod-150026/








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Old 04-24-2012, 11:59 AM
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Definitely looks more original that way. I think on a black car though, a matte black mesh, probably would look better??? I am going to paint my rear bumper like this one pictured as well as the shrouds. Most likely will leave the stock mesh unpainted, but what if? started to enter my head. The only reason I don't want silver is I am debadging the trunk and going for a smooth look in the back with a lip spoiler and am afraid the silver may clash, but I don't know, haven't seen too many pics of this done to black cars
Attached Thumbnails DIY: Better Looking OEM Rear Diffuser-capture.jpg  
Old 04-24-2012, 01:02 PM
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^^^ yeah I never updated that thread, I painted my mesh matte black as well.
Old 04-24-2012, 01:47 PM
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dont know about cooling, but I would think it definitely helps with some drag
Old 04-24-2012, 05:00 PM
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Originally Posted by brilliantblackrx8
...so after a few years, how has this been holding up?
...don't know if you are refering to the paint with the brush like I did, but it's looking the same as the day I put it on however many yrs ago that was
Old 04-24-2012, 07:14 PM
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Spin9k, so I just need to go to a hobby store and pic up some plastic paint, primer and clear, and a 1" brush.

I think with Lebren's smoked accent light, with the rear diffuser painted brilliant black like the rest of the vehicle and this treatment on the unpainted mesh it will look pretty good. Starting to like the idea. I Got the inspiration after just looking at "Gregs" white car, he's got the diffuser painted piano black and my exhaust too!
Old 04-24-2012, 07:56 PM
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^ that's what i did, yes.
Old 04-25-2012, 06:05 AM
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The more I look at that home depot rain gutter option, it looks so good that way, I'm torn LOL
Old 04-25-2012, 06:27 AM
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Originally Posted by Rotr8
dont know about cooling, but I would think it definitely helps with some drag
It helps with cooling too. It's possible to saw off the last 3in of the metal heatshield after opening the fake grille.
Painting it looks ugly imho, real grille ftw!
Old 04-25-2012, 06:43 AM
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I had this and loved it. The holes are little rotors!
Attached Thumbnails DIY: Better Looking OEM Rear Diffuser-426789_130140093778424_100003473015487_113139_993961487_n.jpg  
Old 04-25-2012, 07:06 AM
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Originally Posted by bse50
It helps with cooling too. It's possible to saw off the last 3in of the metal heatshield after opening the fake grille.
Painting it looks ugly imho, real grille ftw!
I've been trying to find a reason to use my cutoff wheel again... this may be a good opportunity. Sorry for the threadjack, but do you have any pics with the shield cut down and the fake grills opened up? It would be cool to show off the Greddy EVOTT!
Old 04-25-2012, 07:10 AM
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I just took the whole shield off, it's heavy!
I don't think i have a picture available at the moment, i'm sorry.
Old 04-25-2012, 03:01 PM
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Here is another way of doing it, that I found on a Japanese blog. Not sure if anyone has taken this route, but it seems tedious and time consuming. My big question is, what do you do about the tow hook area? Interesting concept, and I guess it is making something of it.

He started with a 7mm drill then used a 3.5mm on both sides. At this point, I am assuming he used that large cone drill to ream it out.

He then states that he used the small rotary tools and a triangular file to finish it off. You can see what I am talking about for the tow hook area below.











Old 04-25-2012, 03:48 PM
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I did that with the oe front grill, it was a biatch, took forever too if you dont want the melted plastic look
Old 04-26-2012, 06:55 AM
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Rotr8,

Going to do the Home Depot gutter screen, bought it yesterday as well as the Satin Black. Also got the Lebren Smoked light on the way. Going to cut back 3" of the exhaust shield as well. It's going to look good with the whole diffuser and shrouds painted brilliant black. I'll post up pics in your thread when I complete it.
Old 03-18-2013, 07:33 PM
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someone do this to the front grill
Old 03-18-2013, 07:47 PM
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been there done that,,,





Last edited by Rotr8; 03-18-2013 at 07:49 PM.
Old 03-19-2013, 01:34 AM
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Originally Posted by Rotr8
been there done that,,,




1. Does that expose the ugly foam behind the bumper?

2. Where did you get that sheet material for that splitter and what is it? ive been wanting an excuse to use the CNC...
Old 03-19-2013, 08:59 AM
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Originally Posted by Rotr8
been there done that,,,




it looks so much better! i might do that
Old 03-19-2013, 04:43 PM
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Originally Posted by EricB
1. Does that expose the ugly foam behind the bumper?

2. Where did you get that sheet material for that splitter and what is it? ive been wanting an excuse to use the CNC...
1- probably, don't know I modified my re-bar years ago, before this mod,,,

2 - its polycarbonate I cut mine out on a waterjet
Old 03-20-2013, 01:49 AM
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Originally Posted by Rotr8
1- probably, don't know I modified my re-bar years ago, before this mod,,,

2 - its polycarbonate I cut mine out on a waterjet
Modified? Im scared to even take the foam out

waterjets are sexy
Old 03-20-2013, 04:55 AM
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am i the only one that likes the oem look in the rear?
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