The Manley Performance engine valve identified by manufacturer part number 11103-8 is engineered for a measured performance-engine assembly. Final compatibility depends on the exact engine, mating components, and verified dimensions, not a similar product title alone.
Key Features
Fitment
| Years | Make | Model | Application |
|---|---|---|---|
| 1994-1997 | Mazda | Miata | Verify exact engine and component dimensions |
| 1999-2005 | Mazda | Miata | Verify exact engine and component dimensions |
Specifications
| Brand | Manley Performance |
|---|---|
| Manufacturer Part Number | 11103-8 |
| Product Type | Engine Valve |
| Fitment Type | Vehicle Specific |
| Condition | New |
| Engine Displacement | 1.8 L |
What's Included
One new Manley Performance engine valve in the exact quantity and configuration stated in the specifications. Bearings, rings, pins, locks, fasteners, and installation hardware are included only when expressly listed for this part number.
About Manley Performance
Manley Performance engineers connecting rods, pistons, crankshafts, valves, valvetrain components, and related hardware for professional street, racing, and forced-induction engine builds.
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Frequently Asked Questions
Will Manley 11103-8 fit my 1994-1997 Mazda Miata?
That vehicle range is listed, but compatibility also depends on the exact engine code, bore, stroke, mating components, clearances, and current Manley application notes.
What specifications must match for this engine valve?
Confirm every listed dimension, material, quantity, engine interface, mating component, and current Manley application note. Similar-looking engine components are not automatically interchangeable.
Is professional installation recommended?
Yes. A qualified engine builder should inspect the component, measure the engine and mating parts, verify all clearances, and follow current Manley and engine-manufacturer procedures.
Installation Instructions
Use the current Manley instructions for part number 11103-8 and the engine builder's measured assembly specifications. Verify material, orientation, machining, clearances, fastener procedure, lubrication, balance, torque or stretch values, and break-in before operation.
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