Injen Technology is proud to release the SES1200UP Up Pipe for the 2002-2004 Subaru WRX and STi. The SES1200UP is built from T304 2 Stainless Steel tubing throughout, maximizing exhaust flow for a faster turbo response. Injen also uses 1/2 die caste and machined flanges. Includes studs and O2 Sensor bung for a direct replacement.