Is this the one that is sheet metal and goes down in front of the radiator?
If it is people swear by a .1-.2 better T at the track. I personally have not used one. There is water issues though...some make block off plates that cover the opening uder the filter though so they can block it ff during rain.
Mark...what mods does she have so far?
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if it's cheap & reliable, it ain't fast, if it's fast & cheap, it ain't reliable, if it's fast & reliable, it ain't cheap