Are after market catalytic converters for 2004 f-150 5.4l 3 valve 4x4 are as good as what comes stock, or from dealer. Names like magnaflow, walker, etc. Seem to be popular. And do you like the idea of using a after market performance chip, throttle body spac need little advice
have the same problem?
Sunday, October 23rd, 2011 AT 4:59 AM