This quality RAGE performance big bore exhaust system will not only increase the power output of your engine, but will also sound good too! Complete with stainless steel rear muffler this system is a simple bolt on solution, designed specifically for 2002 onwards Subaru WRX and STI version 8! The kit is comprised of 3 components only (not 4 as shown in photo) (Front pipe with cone, intermediate muffler and rear muffler) which measure 76mm in diameter. The 3 components can also be purchased separately if required. Note – we can supply the parts needed for the 4th bullet setion, but you / your installer would need to make that section up out of the supplied parts. BB9055 (kit). Twin scroll turbo only.