Features: Utilize FMF''s patented module precisely located at the initial stage of the header for specific applications . Position "Bomb" increases performance . Horsepower is increased as much as 10% . Act as "pre-muffler", helping to lower the decibel output . The expansion and contraction of exhaust sonics through the system causes increased flow . Available in stainless steel for strength combined with light weight and in titanium for even greater weight savings . Select applications available in SX version that is designed for more low- to mid-range power and an MX version that is focused in the mid-to-upper rpm range. Most of our FMF PowerBomb headers are not developed for use with stock mufflers as it defeats the purpose of improving performance..