The Revolution RS for the Subaru WRX/STI sedan features full 3.0” diameter piping for superior performance. *Data collected on stock vehicle *Retains catalytic convertor, front pipe Notes: reuse factory doughnut-gasket and hardward for mid-pipe Gasket(s): 3" oval (qty: 2 included) replacement (horizontally mounted muffler with dual outlets) Like all GReddy Supreme SP systems the fully hand-welded 304 Stainless-Steel exhaust carries a Limited Lifetime Warranty. Exhaust gases exit each side of the revised muffler via the two 2.5” diameter piping to quad staggered 3.5” GReddy double-wall slash cut tips, The non-tapered 3” mid-pipe also encases a large resonator section to tune-out drone. This routing allows for the large 3” diameter piping to more smoothly enter the muffler’s center section. The Supreme SP for the Subaru STI hatchback features a large horizontally mounted, 3-section muffler with a "tucked-away" layout.
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