I have approx 50 hours on new TMXIO540 from Mattituck with the Vans Baffle Kit. At 21 squared and 15.5 gph all temps are good. At 21 squared and 12.5 gph cylinders 1 and 2 are just over 400. 3 - 6 are around 370's. The differential temp from full rich to peak EGT for all cylinders are within the same range. Therefore I think I have a cooling problem and not a fuel injection problem. I do not have an engine plenum nor a louver installed. Is there any thing I can do without installing the plenum or louver? If not, then which one will give the maximum amount of cooling and which one is the easiest to do.