Has anyone installed this header on there car? What kind of power gains did they get? And how much louder is it over the stock header?
http://racerwalsh.zoovy.com/product...yl_7993_Mustang_Ford_230023L_Racer_Walsh.html
http://racerwalsh.zoovy.com/product...yl_7993_Mustang_Ford_230023L_Racer_Walsh.html