Hi there Not knowing anything about XR6's I've come up with a list of planned mods. What I'm wondering is do I need a Walbro pump to go with these mods? And is there anything obvious I've left off the list? Will the center muffler become a restriction once the cat is ditched? Thanks in advance. 2004 BA Turbo - NZ HDI intercooler kit Nizpro cold air intake and battery relocation Nizpro valve springs 60lb Seimens injectors Cat removal Ford Flash