i recently installed this brace kit on my car. There were no problems with the front brace with the Stillen Gen 3's and Z1 25 row oil cooler kit, I'm guessing it's just the height of the 34 row that makes it an issue. No issues with the rear interior brace as I have the Coupe.
With the rear underbody brace and the Stillen CBE the clearance is minimal, and there is definitely a humming sound on cold start as the metal parts are so close together. However this noise goes away once the exhaust heats up, and as both parts are mounted solidly, I am not worried about any hitting. Once I get the FI exhaust delivered/installed I will post feedback on the clearance with that exhaust. As far as this brace scraping, it is definitely possible but I haven't experienced this yet. We'll see how it is with the Swift springs installed.
Initial opinion:
I haven't tracked the car yet with this installed, won't get it to the track again until next season. However with spirited daily driving, it is noticeable that there is less roll, it feels more precise on turn in and understeer seems to be reduced/almost eliminated. Going over bumps especially at low speeds it is quite apparent that there is less side to side bouncing in the body, everything just feels tighter.
I have just ordered the GTSPEC 2 point and 4 point braces, i think these will complement the Nismo brace kit well, rather than one replacing the other.
Looking forward to posting more on this when I get home and have a chance to drive the car more.
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