Skunk2 recently released their new 4-2-1 equal length header for the S2000. Introductory pricing was at $750 which made it on our 'to-do' list for dyno testing. Test car was a stock 2007 S2000 with 50k miles. We performed a baseline before and after the header install, then began installing supporting mods and Hondata Flashpro tuning for favorable results.