JD,
I went to ACE True Value and gathered all of the mounting hardware. Mine was absent as well. For the vent mounts I got 4- 1/4" × 1.5" long flanged head bolts for the vent mounts. 4-1/4"×2" wide flanged metal washers and 4-1/4"x2" wide flanged rubber washers. For the lower outer fin mounts I believe I bought 2- #8×1"long flanged head bolts with washers. I also bought 2 aluminum storm window brackets to hold the fin secure to the lower part of the bumper near the wheel opening. The four tabs on the diffuser above.the exhaust need to be drilled with either a 1/2" to 9-1/6" hole. Use your exsisting plastic push rivets to secure these four mounting points. Hope this helps.

 

Thanks! Can you send a picture of the fin mounting setup? There are no holes or threaded inserts on the carbon one so I'm not sure what the #8 screws thread into

 

I guess you will need to drill a small hole in the center of the the raised part but not all the way through and use a pan head screw to hold the bracket. Not sure why they didn't put the screw insert on that mount. Here are some pics. I added one to the previous response.

 

Great write up and pictures! Who did you buy the defuser from?

 

Yeah, looks like that's the way I'm going to have to go with it. Thanks for your help!!

 

One pix.

 

https://www.corvetteforum.com/forums...-required.html

There is the link to the sale thread

 

crazystevex
Do you have anymore pics of your car in more sunlight so as to see the brilliance of the green next to the diffuser.

 

Not at the moment but I will try to get some good pics at sunset sometime. It's hard to see the copper flare in the metallic unless the sun is shining directly on the paint, so its hard to get good angles sometimes but I'll see what I can do.

 

This $15-20.00 can of 3M 94 Primer adhesion promoter makes 3M tape stick a lot better

 

Really wish I could find those window brackets that you used. Home Depot in Canada doesn't have them and they actually just recently stopped carrying Stanley products. Their inventory compared to the American stores is astonishingly terrible.

 

Give me your address and I will mail you a few. I have some left over from my install.

 

Thanks! PM sent

 

With those mufflers in there I doubt that there was much air passing through the stock bumper vents and I don't think that they ever did much for ventilation, as a screen instead of those thin slots would have worked much better. If they were really passing air, dirt and debry would collect around it. It is cosmetic just like the diffuser to break up what would have been a large featureless panel just like the rest of the indent line around that area.

 

Going to revive this thread with my own input after installing mine today.



First, it's a nice product but the install can be frustrating.

Before attempting the install, tap the threads for the inserts in the back. They get filled with resin and partially covered. Test some 1/4" bolts to make sure they thread in VERY easily.

The biggest obstacle during the installation is the exhaust. I have the stock Z06 exhaust and if you drop the exhaust and install the diffuser you won't be able to get the exhaust back over the diffuser.

What you have to do is drop the exhaust, keep it supported, install the diffuser with the mufflers still above the diffuser (but loose and unbolted). You need to leave them unbolted so you can move them around to get your arms behind the bumper. You will have very little space to work with since the mufflers have to stay above the diffuser. This makes locating the threaded inserts in the rear bumper vents extremely frustrating. This is also why it's extremely important that you tapped the threads, otherwise you will fight for an hour trying to start the 1/4" bolts.

I neglected to use any double sided tape during the install, it doesn't stick well to the back of the diffuser anyways.

Lastly, since the carbon fiber diffuser doesn't have any threaded inserts on the outer most fins, I decided to just drill right through the bottom and use a long 1/4" bolt with a nylon finishing washer to keep it all together.



Looks like it would stand out, but with the car on the ground you can't see it at all when standing beside the car. It's obviously hidden under the diffuser.

 

Is there a functional purpose to this modification?

I think I sort of like how it looks in the pictures, but given the overall mass that is my C5's rear end, I'm just not clear as to why one would do this.

Is this an attempt to copy the looks of late model sports cars?? Please tell me that's not what's going on here.

 

Yes that's it exactly.
It's a vanity piece.
I should be getting a Carbon Fiber version soon.

 

Nice doublec4! The carbon one looks great on your car.

 

Hahaha

 

Next up, trapezoidal tail lights