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Tomioka Racing Subaru Single Scroll Unequal Length Exhaust Manifold with 3 bolts Up-pipe - 2002-2014 Subaru WRX / 2004-2021 STI PDM_engine-dress-up So by dramatically reducing theTomioka Racing Subaru Single Scroll Unequal Length Exhaust Manifold with 3 bolts Up pipe 2002 2014 Subaru WRX 2004 2021 STI The Tomioka Racing Equal Length Exhaust Manifold with Up Pipe is a stainless steel performance manifold for EJ Subaru WRX and STI improved exhaust scavenging, better turbo spool. Equal Length Design for Balanced Pulse Separation Equal length exhaust manifolds ensure each cylinder contributes equal exhaust energy to the