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The Manley Performance engine valve identified by manufacturer part number 12330B-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
- 2.140 Inch Head Diameter: Matches OEM specs for 6.4L Hemi heads with swirl polished finish to boost intake flow efficiency.
- 4.880 Inch Valve Length: Ensures precise fit in Gen III Hemi cylinder heads with calculated stem height of 1.915 inches.
- 0.341 Inch (11/32) Stem Diameter: Provides strength and compatibility with standard valve guides and seals.
- Stainless Steel Construction: Offers corrosion resistance and fatigue strength for long term racing reliability.
- Hollow Stem Race Flo Design: Reduces valve weight by up to 30 percent while enhancing heat dissipation for sustained high RPM performance.
- Pair with high performance valve springs rated for 8000 RPM such as Manley 29403-16.
Fitment
| Fitment Status | Engine and build verification required |
|---|---|
| Required Verification | Exact engine code, dimensions, mating components, material, intended power level, and current Manley application listing |
Specifications
| Brand | Manley Performance |
|---|---|
| Manufacturer Part Number | 12330B-8 |
| Product Type | Engine Valve |
| Fitment Type | Fitment Verification Required |
| Condition | New |
| Engine Displacement | 6.4 L |
| Quantity | 8 |
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.
Related Manley Performance Products
- Shop all Manley Performance products
- Manley 2011+ Chrysler / Dodge 6.4L Hemi w/ Triple Groove (2.140) Race Flo Intake Valves (Set of 8)
- Manley Chrysler Hemi 6.1L w/ Triple Groove 2.080in Race Flo Intake Valves (Set of 8)
- Manley 2011+ Chrysler/Dodge 6.4L Hemi w/ Triple Groove (1.654) Race Master Exhaust Valves (Set of 8)
Frequently Asked Questions
How do I verify the application for Manley 12330B-8?
Match the exact Manley part number and engine code, then confirm every listed dimension, material, mating component, clearance, and intended power level before ordering.
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 12330B-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.
Engine
Shop automotive engine parts, cooling-system components, oil-system upgrades, ignition parts, pulleys, sensors, gaskets, fuel components, and engine-bay accessories at Black Ops Auto Works. This collection covers vehicle-specific replacement parts, performance upgrades, supporting hardware, and universal components for street cars, trucks, SUVs, Jeeps, diesel vehicles, off-road builds, and motorsport applications. Engine Parts and Performance Components The Engine collection brings together components used throughout the engine, lubrication system, cooling system, ignition system, fuel system, crankcase ventilation, accessory drive, and engine compartment. Available products range from replacement sensors and gaskets to rotating-assembly parts, performance cooling systems, supercharger pulleys, catch cans, cylinder heads, camshafts, intake manifolds, and engine-bay dress-up components. Engine compatibility cannot be determined from vehicle model alone. Confirm the exact year, make, ...
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Manley Performance
Explore Manley Performance engine components at Black Ops Auto Works for a coordinated rotating-assembly or valvetrain build. Compare H-Beam, H-Tuff and Turbo Tuff rod references, piston and crankshaft choices, valves, springs and supporting hardware. Select components with your builder for the actual engine combination and measured requirements.Connecting Rods and Rotating AssembliesManley rod listings distinguish engine applications, beam designs, lengths, wrist-pin sizes and fastener specifications. Review the complete combination before comparing H-Beam, H-Tuff or Turbo Tuff references. Crankshaft and piston choices need their own stroke, journal, bore, compression-height and clearance review for the planned assembly.Valves, Springs and RetainersThe listed valvetrain range includes separate intake and exhaust valve references plus spring-and-retainer kits with specific contents. Match exact cylinder-head application, valve dimensions and the builder’s camshaft and installed-heig...
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