Description
Built around the requirements of 2000-2003 Subaru WRX (EJ20) / 04 STI Exhaust, this Extreme Duty exhaust valve family gives engine builders a focused way to select the dimensions their cylinder-head combination calls for. The parent listing is distinguished by Part #11137-8, which should be cross-checked against the rest of the engine combination.
The correct 2000-2003 Subaru WRX (EJ20) / 04 STI Exhaust valve is the one that matches the finished head. Stem clearance, seat contact, installed height, spring package, and keeper location should all be checked during assembly.
Key Product Details
- Application: 2000-2003 Subaru WRX (EJ20) / 04 STI Exhaust
- Manley Series: Extreme Duty
- Valve Position: Exhaust
- Title Specification: Part #11137-8
- Manufacturer Part Number: 11137-8
Package Quantity
Set of 8 valves. The selected configuration is supplied as a 8-piece valve package. This quantity applies to the selected Manley SKU family shown on this product page.
Selection & Fitment Notes
Valve fitment should be verified from the cylinder head itself; check the required head size, stem size, overall length, seat work, and valvetrain geometry rather than relying on engine name alone.
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.