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Yeah the aluminium panels were needed to keep it cool. With the RB engine there isnt much space behind the radiator to put fans on or to allow a vacuum to draw air through. There is one slim 12" on the RHS but two 12" on the front. The ducting fits into the Vertex front bumper and around the headlights perfectly and ensures any air going around the intercooler gets channelled into the radiator. It used to run at around 82-83deg celsius on the open road without the ducting and the fans on, getting over 100deg after 3 laps of hard running at the track. Now it sits at 75-76deg on the open road and i can hammer it hard at the track for 8-10 laps without it getting over 100deg. Havent tried going longer than 10 laps as the tyres dont last past that :P
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