Trackspec is now offering a drop in replacement for the S550 GT hood vents. Install was pretty straighforward - just had to cut out the underside of the hood with a dremel and the Trackspec vent drops right in. I understand they are also working on a GT4-style center vent which should be released shortly. Hopefully the combination of the two will perform close (both heat extraction and reduced lift) to the Tiger Racing or KohR hoods for a fraction of the price.
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