I made this without headers. That was done with everything in my signature except I had Invidia test pipes at that time now I have 200cel Invidia HFC's they were the least restrictive I could find. I don't think I lost to much from the swap. I needed to have cats for state inspection. No emissions testing where I am but cats have to be present. I have been pretty happy with my setup.
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2013 Ford Mustang GT 5.0 6MT ROUSH intake | ROUSH axle back | ROUSH shift knob | ROUSH coil covers 2009 NISSAN 370Z SOLD
Last edited by redline727; 01-04-2013 at 08:37 PM.
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