i was looking up msds headers in the search and read a few posts that said gutting the pre cats is just as good. i plan on getting the msds headers and y pipe but if just gutting the cat gives as good i gain i would rather just save by gutting the cat than get a new y pipe and a high flow cat. so my question nos is hould i get the msds header or get optimized exhaust maniolds from buckshot and with the money saved get highflow cat and a y pipe?
