I RECENTLY INSTALLED A KERKER 4-1 ON MY 2005 VMAX WITH A STAGE 1 JET KIT. IT SPUTTERS/MISFIRES THRU THE MIDRANGE ONLY. MY MECHANIC TALKED TO DYNOJET AND THEY SAID MY SETUP OF 1.5 INCH BAFFLES AND A STAGE 1 JET KIT WOULDN'T WORK, BUT IT WOULD WORK GREAT WITH 2 INCH BAFFLES. DOES ANYONE HAVE ANY...