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HKS Stainless Equal Length Exhaust Manifold 2004-2018 STI Agency Power Unequal Length Header 02-14 WRX / 04-17 STI Private MFG Exhaust Manifold with Up Pipe - 02-14 WRX / 04-17 STI
Includes Gaskets Promotes the Rumble Manifold with Up Pipe and Gaskets
Agency Power Equal Length Header 02-14 WRX / 04-17 STI Tomei Unequal Length Manifold and Up Pipe 02-14 WRX / 04-17 STI Tomei Equal Length Manifold and Up Pipe 02-14 WRX / 04-17 STI
Increases Power Includes Up Pipe, Wrap, Gaskets Includes Up Pipe, Wrap, Gaskets
Perrin Equal Length Header 1.5 inch Primaries 02-14 WRX / 04-17 STI Perrin Big Tube 1.625" Primaries (Big Tube) Equal Length Header 02-14 WRX / 04-17 STI MAP SUBARU 4-1 EQUAL LENGTH HEADER 2004-2018 SUBARU STI
New Design 1.625" Primaries for High Power High Quality Proven Results
Killer B Equal Length 4-1 Holy Header EJ Series 2-Bolt 02-14 WRX / 04-17 STI Killer B Equal Length 4-1 Holy Header 02-14 WRX / 04-17 STI Killer B Equal Length 4-1 Holy Header w/ EWG 02-14 WRX / 04-17 STI
Made in USA Made in USA Made in USA