hey im going to put cold air intake, pullys, cams, headers, heads, andexhaust catback. I know that 2.5" piping is the best for my car since im not gettin a turbo but i found a muffler/exhaust tip that i really like but its inlet is only 2.25" wide. With all the mods, how many less horse would i get with the 2.25" piping compared to the 2.5" piping?