IS - 3rd Gen (2014-present) Discussion about the 2014+ model IS models

seibon rear diffuser not fitting

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Old 01-15-18, 06:10 PM
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Tim151
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Default seibon rear diffuser not fitting

So I bought this brand new seibon diffuser for my 15 f sport and the tabs underneath do not match up even close to the factory mounting points any help or suggestions would be appreciated

Old 01-15-18, 07:08 PM
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jameshan
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Seibon parts fit HORRIBLY. When I installed their CF Trunk, I literally had to drill every hole again in the right spot and file all the cut outs bigger and the taillights dont even fit. Had to nearly cut out the whole housing to make it even fit somewhat and theres still a gap. Screw holes are all in the wrong place too. It's just not worth buying from them unfortunately.
Old 01-16-18, 07:07 AM
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zhieson
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I just got the same diffuser and fitment is not perfect. It's good enough for me but you wouldn't be unique in your problem.

I had to drill some extra holes, but mainly for the part that fits near the wheel well (as there were no holes that lighted up at all). However, the tiny grommets lined up for me (that connect the bumper to the diffuser) as well as the larger grommets that secure the bumper to the plastic underbody. It took some physical haggling but I was able to get most grommets like stock.
Old 01-16-18, 01:10 PM
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specONE
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You posted on a FB group and i replied to you there that I had the same issue 3 years ago but gave up and sold it off instead.
Yeah horrible fitment for Seibon.
Contact Seibon and let them know of this and demand one that does not have the same issue.
Old 01-16-18, 03:06 PM
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Tim151
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Well got the diffuser on ended up using zip ties for the tabs underneath
Old 01-16-18, 04:40 PM
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Defender15
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Default Trunk

[QUOTE=jameshan;10083289]Seibon parts fit HORRIBLY. When I installed their CF Trunk, I literally had to drill every hole again in the right spot and file all the cut outs bigger and the taillights dont even fit. Had to nearly cut out the whole housing to make it even fit somewhat and theres still a gap. Screw holes are all in the wrong place too. It's just not worth buying from them unfortunately.[/QUOTE

had the same problem with the trunk. My tail lights didn' for and the holes were drilled opposite. I sent it back.
Old 01-16-18, 06:56 PM
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jameshan
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[QUOTE=Defender15;10084240]
Originally Posted by jameshan
Seibon parts fit HORRIBLY. When I installed their CF Trunk, I literally had to drill every hole again in the right spot and file all the cut outs bigger and the taillights dont even fit. Had to nearly cut out the whole housing to make it even fit somewhat and theres still a gap. Screw holes are all in the wrong place too. It's just not worth buying from them unfortunately.[/QUOTE

had the same problem with the trunk. My tail lights didn' for and the holes were drilled opposite. I sent it back.
Are they aware of how bad their mood is? Or do they just not care lol
Old 01-16-18, 08:58 PM
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anthonys2r
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Seibon hood (OEM style) and rear spoiler fits perfect for me.
Old 01-17-18, 04:35 AM
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Ciggy
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Originally Posted by Tim151
Well got the diffuser on ended up using zip ties for the tabs underneath
I replied on facebook also. Zip ties! That's what I used also. Those tabs really don't do much it's for added stability of the diffuser. Zip ties will work just fine. I'll check mine after this winter and make sure they have held up.

I also have the Seibon spoiler and it fit 9/10.
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