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Does anyone have any experience with 180 degree headers with Y-block? This following video is about finnish historic racing Ford Mustang 289 cid small block engine and it sure sounds wicked. Might be usable at LSR events? In that engine it brought about 2% more torque overall but in range of 4200-5500 rpm it brought 20+ Nm which is about 5 % more over 4 to 1 headers used. With Y-block all you have to do is route #2 and #3 tubes to left side collector and #6 and #7 to right side collector... https://www.youtube.com/watch?v=o1ucmMFHIZMSome theories about... https://www.physicsforums.com/threads/180-degree-header-design.310679/http://www.burnsstainless.com/BundleofSnakes-2.aspx
 Seppo from Järvenpää, Finland
www.hollowheads.net (just click the hole in the head to proceed)
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