On the heat riser I always keep it looking functional for aesthetic reasons but I have the tube blocked and stuffed with aluminum foil.
The scoops work surprisingly well on the 69 despite being small and in the middle of the hood. With a inlet temp sensor I can watch the temp come down when moving and nearly match outside ambient temps within a couple degrees after moving for a couple miles.
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2019 Pontiac Heaven class winner
https://youtu.be/XqEydRRRwqE
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