Meh no harm no foul, it comes with the purchase :]

1.SpidArman
2.It's2klean - gloss black finish
3.JPhoa
4.Ans2k-wrinkle black, more info of the side pieces/inner liner. would love to pay a lil extra for those.
5.Siik_ap2
6. johnnnyjeans
7. petawabit - AND Strut Bar
8. MBHS2K
9. DiscoWagon
10. mr 280z again - gloss black finish!
11. Jso - gloss black finish
12. id003

 

just curious how functional are these?? are the fins perfectly parallel to the car and parallel to one another? just a lil scared if i go on a very long straight and hit triple digits the diffuser would make the rear a little twitchy.

 

....cant see it being big enuf to be making the car twitch...

 

Its difficult to really measure the effectiveness but many people have come to the same conclusions with these and that would be increased stability at higher speeds and less drag. Everyone that has bought one and tried it has come back with the same results and that is an improvement in performance at pretty much any speed over 50mph. There is a fair amount of obnoxious suspension and exhaust hanging down in the rear undercarriage and deflecting the air around these parts will evacuate a significant amount of high pressure air that is lifting up and dragging on the rear end.

All of these parts are cut on a precision CNC plasma table with a +-.005" tolerance, which means all of the parts will be very straight.

Take a quick read through the first few pages of the thread, a couple people have tested and tracked their vehicles with and without the diffusers and have seen changes in performance that can be measured by track times etc.

I prefer to let the parts and the customer speak for the parts, but I saw a noticeable improvement in handling at higher speeds and saw a 5-10% improvement in gas mileage. I drive my car pretty much exclusively on the freeway so these result will vary depending on your driving style.

 

so paypal gladfab@gmail.com $100?

 

You got it.

Under description put: "S2Ki rear diffuser group buy, "USERNAME", "gloss or wrinkle"

 

do you have any plans for the side pieces?? i have an invidia v4 q300 dual, probably smaller than the oem exhaust.

 

I do, but it will over complicate this group buy if we try to include any extra parts. Once I become a sponsor and we finish up with this group buy (which should be pretty quick) we can work on a group buy for the side pieces or for other parts.

 

 

how much would they be outside this group buy?