I just bought the Kooks long tubes, do I need the x for proper fitment? I really wanted the SLP X. If they made slp headers I would have got them, but they dont so I am trying to get the most SLP sound as possible.
Mustang SLP Coated Long Tube Headers at AmericanMuscle.com
these are for 03-04 cobra/mach but I'm using headers for 99-04 dohc on my car so they'll fit fine.
they do make slp headers bro. and more than likely the slp midpipe will not fit, ask if you can return them if they don't
smog air injection or secondary air injection, can't remember exactly which one it is but you get the idea.