Description
Built around the requirements of Subaru WRX EJ205/STI EJ257 33mm, this Race Master 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 33mm Head, which should be cross-checked against the rest of the engine combination.
The correct Subaru WRX EJ205/STI EJ257 33mm 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: Subaru WRX EJ205/STI EJ257 33mm
- Manley Series: Race Master
- Valve Position: Exhaust
- Title Specification: 33mm Head
- Product Family Detail: Race Series application focus
- Manufacturer Part Number: 11171-1
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.