The Derale single RAD fans are 'ultra-quiet', and I have used them in the past, they are dead silient. The 12" fans are two speed, you can hook them in parallel, and run off a controller made for 2 fans or dual speed fans. Just an fyi, the quiet ones are usually rated lower in CFM than others, but if you can get away with total 2900 CFM (true CFM) then you will be fine.
Derale part number for the 12' is 16212.
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1970 GTO Judge Tribute Pro-Tour Project 535 IA2
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1971 Trans Am 463, 315cfm E-head Sniper XFlow EFI, TKO600 extreme, 9", GW suspension, Baer brakes, pro tour car
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