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1) The best gas you can get in california is 91 from a normal gas station. Some stations have 100 Octane race gas but you need to be tuned for that. Typically the car has knock sensors and will retard the timing for the lower octane. All gas in California has 10% Eth. Never heard Shell V power doesn't have 10% Eth.
2) Just make sure your top mount intercooler isn't leaking.
3) You may need to lower your left headlight height and increase the right headlamp height as US Spec is driver side is lower than the right side. This is the "cut off".
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N1rve
2019 BMW ///M4 - Alpine White | Sakhir Orange/Black Leather | M-DCT | Executive Package | 19" Black 437M Wheels | Carbon Fiber Trim | Sunroof | Active Blind Spot | Heated Steering Wheel | Adaptive M Suspension
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