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I've bought the fins too. There are 3 bolts / screws that attach each side to the diffuser, one hole where it appears they attach to an existing screw fixing on the rear bumper, but I can't work out whether the holes marked in red are also used to fix it to the bumper (they don't have screw fixings preinstalled).
@Shawn Hong :From corner to center of 1st hole is 1.5"
It would be awesome if you could give the measurements in millimetres for the arrows marked in red below (centre of hole to outer edge). This would really help me when I fit the side blades.
Last edited by Zee Germanz; 08-31-2022 at 09:24 AM.
I've bought the fins too. There are 3 bolts / screws that attach each side to the diffuser, one hole where it appears they attach to an existing screw fixing on the rear bumper, but I can't work out whether the holes marked in red are also used to fix it to the bumper (they don't have screw fixings preinstalled).
From the look of them - i'm not so sure those red circled holes that are used for attachment - unless it you be from other inside of the bumper down into these holes - but the don't look threaded at all.
Also from the other side... are there corresponding holes to screw through?
From the look of them - i'm not so sure those red circled holes that are used for attachment - unless it you be from other inside of the bumper down into these holes - but the don't look threaded at all.
Also from the other side... are there corresponding holes to screw through?
There’s no thread in the holes circled in red. I was wondering if they were for ‘push rivets’ from inside the bumper lip.
I don’t believe there are any parts on the Porsche system that correspond with those holes, though I may double check. Just odd why the holes are there.
It would be awesome if you could give the measurements in millimetres for the arrows marked in red below (centre of hole to outer edge). This would really help me when I fit the side blades.
Ah, sorry, did not see this until now. I already gave my dealership the rear diffuser kit for installation while the Spyder is getting a warranty work. If you just drill the first hole, the rest can be drilled by using the side blade holes as template. So the first hole is 4cm or 3.81cm (1.5") from the corner to center of hole.
Screen grab from the MR JWW video where they have stripped down and 'repainted' their GT4RS.
The Screen grab shows the underside of the rear bumper... there are not additional screw/affixings to the rear bumper itself for the rear aero fins... looks like they are just screwed unto the plastic diffuser valence(x3) and re-use the single bolt towards the front. Or there are addition fixings... its on the inner lip.
Screen grab from the MR JWW video where they have stripped down and 'repainted' their GT4RS.
The Screen grab shows the underside of the rear bumper... there are not additional screw/affixings to the rear bumper itself for the rear aero fins... looks like they are just screwed unto the plastic diffuser valence(x3) and re-use the single bolt towards the front. Or there are addition fixings... its on the inner lip.
Just a thought but maybe one bolt and 3M tape will suffice? However, I would prefer to take the rear valance off and drill 3 holes in it as a better way to attach them.
08-31-2022 | 06:40 AM
