This is probbaly a pointless post and im 99% sure of the answer but just wanna make sure . I have a b16 in my ek with a megan racing header with a 2.25" collector, a high flow car, 2.25" custom piping, but my magnaflow muffler is 2.5", not 2.25" which i ordered (they sent me the wrong one)...so with my muffler being .25" bigger will i be losing ANY backpressure what so ever? It almost seems a tad slower 0-4K but i know its just me...anyone?