the airflow when the bonnet when standard is areo dynamic and allows for the air to flow out the bay through the scuttle unhindered as such. when the raisers are put on it raises the rear of the bonnet. now when the air passes over it it's not so aero dynamic and hot pockets are created when the air is rushing over the car. this has been tried and tested. as he has said he is now getting flat spots..... thats because the actual air intake is hotter because of these hotspots created!
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