dougbgt6 Posted February 1, 2018 Report Share Posted February 1, 2018 Simon, I understand what you mean about restriction, but there would be dire symptoms if this was happening. Take your filters off and put your hand over the aperture to see what happens! The engine sucks in the air it needs through the filters, enclosed or not. The only difference with K&Ns is the air temperature. You could construct a system of tubes and vents to make a "cool zone" in the area of the filters, but a lot of work for little gain. Stick with the K&Ns, if they're working, or revert to the original system. Lots of zombie threads on here! I have one about my brothers Spitfire which is six months old (The thread, not the Spitfire) Always good to re-examine old issues. Doug Link to comment Share on other sites More sharing options...
Amphletize Posted February 1, 2018 Report Share Posted February 1, 2018 Thanks Doug, I think I came across it off the back of a semi-related search and just started reading! Simon Link to comment Share on other sites More sharing options...
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