guys i just installed my obx headers and i can say that they are better than pacestter or kirk much improved hp and adding 2.25 inch piping made it have less hp so reinstalled the stock piping 2 iches and it has more hp and runs faster
and it takes out my cat convertor so im running straight pipes now and flames are coming out the tailpipe of my magnaflow muffler
found out that the muffler with dual outlet mufflers gain less hp than a single outlet muffler like my magnaflow straight through exhaust it more effeicient and gains better hp
im rolling now and my car is freakin retarded loud have to keep it under 2500 rpms to keep it from being loud
exceptional power noticing from 3000 to 5500 or 6000 rpms