Home / Shop / Manley Big Block Chevrolet Extreme Duty Exhaust Valve - 5.522in Overall L 1.900in Diameter - Single

Manley Big Block Chevrolet Extreme Duty Exhaust Valve - 5.522in Overall L 1.900in Diameter - Single

SKU: MAN12739-1

Valves

MAN Extreme Duty Valves...

Manley Big Block Chevrolet Extreme Duty Exhaust Valve - 5.522in Overall L 1.900in Diameter - Single

Manley Performance

Manley Big Block Chevrolet Extreme Duty Exhaust Valve - 5.522in Overall L 1.900in Diameter - Single

SKU: MAN12739-1

Valves

MAN Extreme Duty Valves...

Available from MFR. This item is available from the manufacturer's distribution centre. The dispatch timeframe shown is an estimate based on historical order processing and release times for this part. This item is not held in our own warehouse, and actual dispatch timing may vary depending on manufacturer workload and logistics at the time of ordering.

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Description

Discover the extraordinary capabilities of Manley Performance Products' Extreme Duty Series Valves. Engineered to cater to the demanding needs of Top Fuel and Funny Car drag racers, Big Block Chevy marine enthusiasts, and Small Block Chevy restricted carburetor circle track competitors, these valves are your ticket to unparalleled performance.

Product Overview

Features and Benefits

Ideal for Specialized Applications: Tailored for any application where extreme force and heat resistance is a must including Top Fuel, Funny Car, and Marine Engine applications.XH-432 XtremeAlloy: The hallmark of excellence in exhaust valve material construction.Built to Last: Featuring chrome stems and hard tips for exceptional longevity and wear resistance.Optimized Performance: Swirl polished under head areas and fully machined combustion faces improve airflow and combustion efficiency.

Product Details

Category Hierarchy:	Valves>Stainless Steel>Extreme Duty
Description:	Manley Big Block Chevrolet Extreme Duty Exhaust Valve - 5.522in Overall L 1.900in Diameter - Single
Engine - Web:	Big Block
Engine Detail - Web:	Big Block
Engine Family:	Big Block
Engine Type:	ICE
Engine:	Big Block
Head Diameter:	1.900
Industry:	Automotive
Make - Web:	Chevrolet
Make:	Chevrolet
Margin Width:	0.075
O/A Length:	5.522
Out of Stock Message:	Call for Availability
Part Number:	man12739-1
Product Market:	Domestic
Product Type:	Engine Exhaust Valve
Prop 65 (C, R or CR):	CR
Prop 65 - Short Label:	Prop 65 Warning Label.JPG
Prop 65 Yes/No:	Yes
Seat Width:	0.085
Stem Diameter:	0.3415
Tip Length:	0.250
Title - Web:	Manley Extreme Duty Series Chevy Big Block Exhaust Valve - 1.900 in. Head Dia., 5.522 in. O/A Length, 0.3415 in. Stem
Title:	Manley Valve - Exhaust, Valve-BBC E/D 1.900, +.100
Top of Head:	12 Degree Dish
Underhead Angle:	18.00
Underhead Radius:	1/2
Valve Quantity:	1
Valve Series:	Extreme Duty Series
Valve Type:	Exhaust

Part Type

Engine Exhaust Valve

Data: v4.2 - Upd: 2026-10-13 17:07:34

Features

Built to Last: Featuring chrome stems and hard tips for exceptional longevity and wear resistance.
Ideal for Specialized Applications: Tailored for any application where extreme force and heat resistance is a must including Top Fuel, Funny Car, and Marine Engine applications.
Optimized Performance: Swirl polished under head areas and fully machined combustion faces improve airflow and combustion efficiency.
XH-432 XtremeAlloy: The hallmark of excellence in exhaust valve material construction.

Specifications

Product Attributes - Brand: Manley
Product Attributes - Manufacturer's Part Number: 12739-1
Product Attributes - Part Type: Valves
Product Attributes - UPC: 807298070971

Reference Information

Brand Name/s	Manley Performance
StreetFX SKU	man12739-1
SFX Item ID	4060549
Supplier Item Code	4060549
Manufacturer SKU	12739-1
Manufacturer UPC	807298070971
Alternative References	5.522in, 1.900in