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Manley Big Block Chevy 2.300 Dia .250in Longer Race Master Intake Valves (Set of 8)

SKU: MAN11870-8

Valves

MAN Race Master Valves...

Manley Big Block Chevy 2.300 Dia .250in Longer Race Master Intake Valves (Set of 8)

SKU: MAN11870-8

Valves

MAN Race Master Valves...

A$385.81
Available from MFR. In stock at 2 locations (10 available)

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Description

Intake Valve - Race Master - 2.300 in Head - 0.342 in Valve Stem - 5.494 in Long - Stainless - Big Block Chevy - Set of 8

Valve - Intake

Manley Race Series valves are meticulously engineered to meet the rigorous demands of bracket, drag, and oval track racers and are the ultimate choice for engines operating under 8000 RPM.

Additional Information

Manley Valve - Intake, Valve-R/M 2.300,+250

Part Type

Engine Intake Valve

Data: v4.2 - Upd: 2026-11-09 03:41:15

Features

  • Chrome Stems and Hard Tips: Chrome stems and hard tips are incorporated for enhanced longevity and wear resistance.
  • Recommended for Alcohol Engines: These valves are the recommended choice for exhaust valves in alcohol engines, ensuring reliable performance even in demanding conditions.
  • Stainless Steel Construction: Both exhaust (XH-426) and intake (NK-842) valves are constructed from high-quality stainless steel for unparalleled durability.
  • Swirl Polished and Fully Machined: The valves feature swirl polished under head areas and fully machined combustion faces to optimize airflow and combustion efficiency.
  • Variety of Shapes: Choose between Race Master (Straight Stem) and Race Flo shapes to suit your racing engine's specific requirements.

Data: v2 - Desc: v4.2 - Upd: 2026-11-08 05:25:50

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Specifications

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s Manley Performance, Manley
StreetFX SKU man11870-8
SFX Item ID 4060777
Accounting SKU man-11870-8
Manufacturer SKU 11870-8
Manufacturer UPC 807298054438
Alternative References 11870-8, MAN-11870-8

Valves, Intake, NK-842 Stainless, 2.300 in. Diameter, .3415 in. Stem, 5.494 in. Length, Set of 8

Manley Race Master valves are designed and engineered to withstand the abuse of the track. Race Master valves are targeted by the bracket, drag, and oval track racers, or even those with modified street engines that are operating at engine speeds below 8,000 rpm. These valves are constructed from XH-426 material for the exhaust and NK-842 for the intake valves, making them the strongest valves in their class. Whether everything is on the line at the track, or you just enjoy your high performance car or motorcycle on the street, trust Race Master valves by Manley to keep you on the move. Order the model designed for your vehicle year/make and engine application.

Product Attributes
BrandManley
Manufacturer's Part Number11870-8
Part TypeValves
Product LineManley Race Master Valves
UPC807298054438
Valve PositionIntake
Intake Valve Head Diameter (in.)2.300 in.
Intake Valve Head Diameter (mm)58.420mm
Intake Valve Stem Diameter (in.)0.342 in.
Intake Valve Stem Diameter (mm)8.68mm
Intake Overall Valve Length (in.)5.494 in.
Intake Overall Valve Length (mm)139.548mm
Undercut StemNo
Swirl-PolishedYes
Valve Tip Length (in.)0.250 in.
Valve Tip Length (mm)6.350mm
Valve MaterialNK-842 stainless steel
Lock Groove Quantity1-groove
Lock Groove StyleConventional
Approximate Weight (g)137
Valve Head Style5 degree dish
Valve Seat Width (in.)0.080 in.
QuantitySold as a set of 8.
NotesUnderhead/angle radius 10 x .375 in. Margin 0.050 in.

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