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Manley Race Series Stainless Steel Valves 11131-8 Valves, Exhaust, Steel, 1.220 in. Diameter, .217 in. Stem, 4.291 in. Length, for use on Acura®, Set of 8

SKU: MAN11131-8

Valves

Manley Race Series Stainless Steel Valves 11131-8 Valves, Exhaust, Steel, 1.220 in. Diameter, .217 in. Stem, 4.291 in. Length, for use on Acura®, Set of 8

SKU: MAN11131-8

Valves
A$402.15
Limited Availability from MFR Limited stock available from the manufacturer's distribution centre. The dispatch timeframe shown is an estimate based on historical orders of this part. This item is not held in our own warehouse, and availability and release timing may vary depending on manufacturer stock movements and processing at the time of ordering.

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Description

Valve - Exhaust

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 - Exhaust, Valve-R/M HONDA 31mm

Part Type

Engine Exhaust Valve

Data: v4.2 - Upd: 2026-11-10 23:10:45

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 05:29:02

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 man11131-8
SFX Item ID 4929625
Accounting SKU man-11131-8
Manufacturer SKU 11131-8
Manufacturer UPC 807298046143
Alternative References 11131-8, MAN-11131-8

Valves, Exhaust, Stainless Steel, 1.220 in. Diameter, .217 in. Stem, 4.291 in. Length, for use on Acura®, Set of 8

Manley Race series performance valves are a great choice for your bracket, oval track, or high performance street engine. All valves are made from stainless steel (intakes are NK-842; exhausts are XH-426) with chrome stems and hardened valve tips. In addition to being made from high-quality materials, Race series valves are swirl polished and fully machined.

Product Attributes
BrandManley
Manufacturer's Part Number11131-8
Part TypeValves
Product LineManley Race Series Stainless Steel Valves
UPC807298046143
Valve PositionExhaust
Exhaust Valve Head Diameter (in.)1.220 in.
Exhaust Valve Head Diameter (mm)31.000mm
Exhaust Valve Stem Diameter (in.)0.217 in.
Exhaust Valve Stem Diameter (mm)5.51mm
Exhaust Overall Valve Length (in.)4.291 in.
Exhaust Overall Valve Length (mm)109.000mm
Undercut StemNo
Swirl-PolishedYes
Valve Tip Length (in.)0.082 in.
Valve Tip Length (mm)2.082mm
Valve MaterialXH-426 stainless steel
Valve Head Style20 degree dish
Valve Seat Width (in.)0.080 in.
QuantitySold as a set of 8.
NotesFor K20A2 engines.

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