Description
For 2000-2003 Subaru WRX (EJ20) / 04 STI Exhaust cylinder-head work, this Manley Extreme Duty exhaust valve listing groups the available dimensional choices under one application-specific product family. The parent listing is distinguished by Part #11139-1, which should be cross-checked against the rest of the engine combination.
For 2000-2003 Subaru WRX (EJ20) / 04 STI Exhaust, valve diameter changes can alter seat work and chamber/shrouding relationships, while alternate overall lengths can change installed height and rocker geometry.
Key Product Details
- Application: 2000-2003 Subaru WRX (EJ20) / 04 STI Exhaust
- Manley Series: Extreme Duty
- Valve Position: Exhaust
- Title Specification: Part #11139-1
- Manufacturer Part Number: 11139-1
Package Quantity
Sold individually. One valve is supplied per selected SKU. Order the intake or exhaust quantity required for the cylinder-head configuration being assembled. This quantity applies to the selected Manley SKU family shown on this product page.
Selection & Fitment Notes
Use the finished cylinder-head setup as the authority for selection. Oversize valves or alternate lengths may require machining and can affect installed height and valvetrain geometry.
Professional engine assembly and measurement are recommended. Product specifications should be confirmed against the selected Manley part number and the requirements of the exact engine build.