When i bought my Z i already had Stillen G3 intakes, Stillen headers, and Stillen exhaust. I changed out the exhaust with ARK Grip TD's and ARK R-Spec TP's because the exhaust sounded crappy. From what im reading, the Stillen headers arent that great. Would it pay to change them out for a better designed pair of headers? Would the difference in power be significant enough to justify replacing them?
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