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1. Grimspeed did testing with their solid(not pivoting like the cusco)front strut bar, deflection was something like 3-4mm total with out it. With all the bushings and soft tires etc, would steering rack bushings done the same thing? The master cylinder brace does help with pedal feel.
2. Look at post above mine. I'd tell you to ask someone to have you take a blind test drive with it installed and not installed. And finally a 3rd time, and you try to guess which is which among the 3 tests. You'll be looking for noise isolation more than actual feel imo. Loss of trunk space sucks too.
3. Hotchkis is known to overbar cars and it creates cross talk associated with it. One side hits a bump, you'll feel it on the other side. They are more autocross oriented than anything. Not sure if they went for a more modest setup for this chassis.
4. $475, I'd would have gone spl or velox for a little more. Or the cheaper route with spc. But it's your money, plus the cool color!! Looking at the pic, they couldn't even get the correct nuts and bolts so they used washers(fits loose) instead. That zip tie in the end... to hold the metal insert in the bushing... those tolerances scream out "made in random chinese factory"
5. Is the added weight worth it? I personally would have gone with firmer bushings or metal inserts to replace rubber parts that are known deflect quite a bit over some bars that supposedly stop metal chassis parts from deflecting(the rubber bushings are still there!). But hey, I'm not an engineer, just a keyboard warrior. Cusco does make like 20 types of bars for this car.
What tires are you using? what alignment? what brakes? what tracking or competitive driving do you do? Stiffer is not always better. The chassis is plenty stiff for street tires and lower(most) skill levels.
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