Description
This Manley Race Master exhaust valve family is intended for 1990-1999 Mazda Miata 1.8L (BP056) DOHC 16 Exhaust builds where valve dimensions need to be matched deliberately to the cylinder head, seat work, and valvetrain geometry. The parent listing is distinguished by 29mm Head, which should be cross-checked against the rest of the engine combination.
For 1990-1999 Mazda Miata 1.8L (BP056) DOHC 16 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: 1990-1999 Mazda Miata 1.8L (BP056) DOHC 16 Exhaust
- Manley Series: Race Master
- Valve Position: Exhaust
- Title Specification: 29mm Head
- Product Family Detail: Race Series application focus
- Manufacturer Part Number: 11103-8
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.