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Manley 11640-8 Stainless Steel Intake Valve 45.5mm 4.705" LS Engine

(1999-2004 Ford F-150; 1999-2004 Ford Mustang; 1999-2004 Ford F-250 Super Duty; 1999-2004 Ford F-350 Super Duty; 1999 Ford F-250; 2004-2008 Acura TSX)

Manufacturer

Picture for manufacturer Manley

Part Number

11640-8
19 reviews
Sale Price

$202.55

Estimated ship date Wednesday, November 25

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Product Details

The Manley 11640-8 is a premium stainless steel intake valve engineered for high-performance LS engine applications. Featuring a 45.5mm head diameter, .2750" stem diameter, and 4.705" overall length, this valve delivers exceptional flow characteristics and durability for street and race applications.

Key Specifications:

  • Head Diameter: 45.5mm
  • Stem Diameter: .2750"
  • Overall Length: 4.705"
  • Tip Length: .470"
  • Underhead Angle/Radius: 10 x 3/8"
  • Margin: .050"
  • Seat Width: .080"
  • Top of Head: 5 Dish
  • Installed Height: Stock
  • Weight: 78g

Performance Features:

  • Manufactured from Race Series stainless steel alloy for superior strength and heat resistance
  • Pro-Flo design with reduced stem diameter in fillet area for increased airflow and reduced weight
  • Chrome-plated stems for exceptional wear resistance
  • Swirl polished under heads for optimized flow characteristics
  • Fully hardened tips to prevent premature wear
  • Completely machined combustion faces for precise sealing
  • Controlled margin heights and exact stem-to-seat concentricity

Backed by over 40 years of manufacturing excellence, Manley Performance valves are designed to outflow and outperform in even the most demanding environments. This valve is suitable for applications ranging from street performance builds to competition race engines producing 1000+ horsepower.

Products specifications

Fits

1999-2004 Ford F-150; 1999-2004 Ford Mustang; 1999-2004 Ford F-250 Super Duty; 1999-2004 Ford F-350 Super Duty; 1999 Ford F-250; 2004-2008 Acura TSX

Approximate Weight (g)

78

Lock Groove Quantity

3-groove

Lock Groove Style

Conventional

Overall Valve Length (in)

4.705 in.

Overall Valve Length (mm)

119.507mm

Quantity

Sold as a set of 8.

Swirl-Polished

Yes

Undercut Stem

No

Valve Head Diameter (in)

1.791 in.

Valve Head Diameter (mm)

45.500mm

Valve Head Style

5 degree dish

Valve Material

NK-842 stainless steel

Valve Seat Width (in)

0.080 in.

Valve Stem Diameter (in)

0.275 in.

Valve Stem Diameter (mm)

6.985mm

Valve Tip Length (in)

0.470 in.

Valve Tip Length (mm)

11.938mm

Quick shipping, just what i ordered!

I ask Edwin a question or two about my Application and how to in install and he return quite quickly!

Easy checkout! So glad that THMotorsports gives the option for PayPal checkout... makes the process much more hassle-free.

QUICK AND EASY!!!

Great service

Good experience, fast shipping

Great

I easily found the parts I needed.Parts are cheaper than buying on Ebay.If the parts arrive quick I will use this company regulary.

THe product is fantastic. My 03 Tacoma feels as tight as it felt back on 03 when is was brand new. Thank you for a great product and prices. I will be back to you when needs arise .

Mazda cargo mat for the CX-9 SUV came within 1 week. Mat fits perfectly; just as described. Autoplicity had the best price listed for this product; we are very pleased.

Autoplicity had the best price on an ARB locker. They shipped it quickly but was not able to give me the tracking number until after I had already received it.

easy to use website, order delivered promptly Requested to add something to order prior to shipment which they were unable to do.

Good price, hope shipping is quick and part is right fit.

Smooth transaction. Would definitely do business with again in the future.

Great easy to use website with the lowest prices around.

I searched the internet and found Autoplicity to have the best prices by far. Shipping and tracking information was provided next day. I will definitely use Autoplicity again and highly recommend them.

Had a little trouble finding the item needed. A search option would be helpful.

You're the only place that had this part in stock. Thanks!

Great Price! Fast shipping and processing! Cant ask for more! A+

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