k-tec relocation pipe is toss anyway, lost mine power and torque, was shuddering when pulling away because of loss of torque and heat soak.
its nice if you want noise just not for power.
as for suspension, apex it. if your just changing springs go for -40mm or if your going full kit go for -60mm kit, you could always go for coilovers but i was told the apex kit is more planted than coilovers (someone told me fred said that, cant remember who tho?)