It's not my recommendation but if you are looking for more performance rather than its looks, it is worth reading this paper(I couldn't find English version, please translate it). Shapes of some products are nice looking but not effective.
You bought a Rexpeed? I think it looks nice.
One piece of advice. One of my friends attached a voltex generator to the roof with double-sided tape, but it peeled off and fly away while running! If possible, I recommend screwing it.
Do NOT screw holes in the roof of your Evo. Clean the surface really well of all wax/dirt and use GENUINE 3M automotive double sided tape. If it comes with tape that has just the "3" or just the "M" with one or the other conveniently cropped/cut off, it'd not the real deal.
I have the Rexspeed CF on my Rally Red GSR. No need for screws. You can re-shape it a bit if needed by putting painters tape on top of the VG after applying it, or putting a small (2 - 3 lb dumbell on top of either side) for 24 hours
I recommend PL PREMIUM............JK clean well with rubbing alcohol and you could warm up the 3m adhesive with a heat gun or hair dryer before applying I have never had one fly off. Anyone that has one fly off did not prep surface correctly or was installed over a wax coat.
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