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The PLM Subaru WRX & STi EJ25 Equal Length Header (Part #PLM-SUB-HEADER-EJ25) is designed to improve exhaust efficiency and turbo response in Subaru EJ25-powered vehicles. Constructed from premium 304 stainless steel, this equal length header provides smooth exhaust flow, reduces backpressure, and enhances both horsepower and torque across the RPM range.
304 stainless steel construction for durability and corrosion resistance
Equal length design ensures balanced exhaust pulse scavenging
Short primary tubes for quicker turbo spool-up
Symmetrical tubing for improved exhaust flow efficiency
Stainless steel cast 4-1 merge collector
Mandrel-bent tubing for consistent diameter and smooth airflow
| Specification | Detail |
|---|---|
| Primary Tube Diameter | 1.65" |
| Stepped Diameter | 2.0" at 4-1 merge collector |
| Material | 304 Stainless Steel |
| Design | Equal Length, Short Primary |
| Collector Type | Stainless Steel Cast Merge |
| Turbo Location | OEM Location |
Vehicle Applications: Subaru WRX & STi with EJ-Series engines (EJ25)
Oil Pan Requirement: Uses EJ25 oil pan
Fitment Notes:
On 2006–2007 WRX/STi, the oil cooler assembly interferes with fitment. You will need to change the oil filter housing to either the 2002–2005 WRX or 2004–2016 STi version.
On 2002–2005 WRX, you will need a 2.5L or STi oil pan.
