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Manley 11634-8 Stainless Steel Performance Engine Valve 44.5mm Head

(1997-1998 Ford F-150; 1996-1998 Ford Mustang; 1997-1998 Ford F-250)

Manufacturer

Picture for manufacturer Manley

Part Number

11634-8
6 reviews
Sale Price

$202.55

4 left at this price

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Usually delivered within 2 days

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Product Details

The Manley 11634-8 is a high-performance stainless steel engine valve engineered to deliver superior flow, durability, and precision fitment. With over 40 years of manufacturing excellence, Manley Performance has established itself as the industry standard for aftermarket valves — from mild street builds to 1,000+ horsepower race applications.

Valve Specifications:

  • Head Diameter: 44.5 mm
  • Stem Diameter: 0.2750"
  • Overall Length: 4.630"
  • Tip Length: 0.470"
  • Underhead Angle/Radius: 10 x 3/8"
  • Margin: 0.050"
  • Seat Width: 0.080"
  • Top of Head: 5 Dish
  • Installed Height: Stock
  • Weight: 77g (0.170 lbs)

Key Features:

  • Manufactured from Manley's proven Race Series stainless steel alloy for exceptional strength and corrosion resistance
  • Chrome-plated stem for reduced friction and long-term durability
  • Swirl-polished underhead geometry promotes optimized airflow into the combustion chamber
  • Fully hardened tip for consistent rocker arm contact and reduced wear
  • Completely machined combustion face for a precise, repeatable seal
  • Tightly controlled margin heights and exact stem-to-seat concentricity for a superior finished product
  • Pro-Flo design reduces stem diameter in the fillet area, increasing airflow while minimizing valve weight

Manley stainless steel valves are designed to outperform in even the most demanding environments — from daily-driven street cars to all-out race engines. Each valve undergoes strict quality control to ensure it meets the exacting tolerances required by high-performance engine builders.

Products specifications

Fits

1997-1998 Ford F-150; 1996-1998 Ford Mustang; 1997-1998 Ford F-250

Valve Material

Stainless steel

Make

Ford

Tip Length

0.470

Stem Diameter

0.2750

Valve Head Diameter

44.50

Engine Type

ICE

Product Type

Engine Intake Valve Kit

Seat Width

0.080

Top of Head

5 Degree Dish

Valve Type

Intake

Valve Series

Race Series

Engine Valve Quantity

8

Margin Width

0.050

Underhead Angle

10.00

Underhead Radius

3/8

Valve Head Shape

5 Degree Dish

Valve Quantity

8

Valve Sub-Series

Race Master

O/A Length

4.630

Valve Stem Diameter

0.2750

Valve Length

4.630

Valve Tip Length

0.470

Head Diameter

44.50

Title

Manley Valve - Intake, Valve-FD MOD R/M 44.5mm

Order # 26695 I ordered an EGT and a gauge pod. It showed up at my house 4 days later exactly as I had ordered it. The Prices are unbeatable!

Some parts have very limited information such as left or right or if ball joint is included and so on, other than that the prices and shipping seem fair and the web site is easy to navigate. Thanks Dave

seemed a bit hard to find products, but the prices were great and delivery prompt

This is the first time I've ordered from this site, but things look good from what I can tell so far. They had the parts I was looking for (including a fairly specialized racing part) for a price slightly lower than other places I had looked, and my order shipped the next business day. At the time I wrote this, they were also offering $5 back on my order for writing a review. ;-)

Thanks for you swift respond for the email and your accurate information and i hope to deal with you again

Cheapest prices I found online! Ordered at 4:30 on a Thursday afternoon and had 'em waitin' on my doorstep by SATURDAY!

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