I agree on being to low, 1.25" may still be withing having proper geometry or close to it but you still have all those big dips in CA roads to deal with rain, when it happens, etc.....
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I weighed my 11.75", GT rotor version of the BBK today and it was 11lbs, 4.6 oz per side weight savings using my digital postal scale, not counting mounts as mine are not done yet. That would make your setup at 10lbs, 10.6 oz saved per side
Stock rotors are 14lbs, 4.7 oz after being drilled to 4x100 so probably more like 14lbs, 7 or 8 oz.
The 12.19 GT rotors, which weigh more than the others rotors as more mass in the design, a good thing, weigh 9.6 lbs according to the WW site but with hats my 11.75" rotors are 10lbs, 7.7 oz and yours would of been 10lbs, 13.7 oz so a savings of around 3.5 lbs just in rotors.
(yes, I am a bit annal about weight but I also built a 20.4 lb full suspension mountain bike 15 years ago, by far the lightest one in the world and it was strong)
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As for the tall IC, it would require a EU bumper beam to fit or notch the stock one, and then most of it is behind the bumper so not really that great a design. Razor made a good choice in what he picked
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Keep up the great work and posts, really like where you are going with your car
Rick