My Account
My Garage
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order
MY GARAGE Select Vehicle
MY GARAGE

Manley 11670-8 Pro-Flo Stainless Steel Engine Valve 2.100" Head

(2006-2008 Jeep Grand Cherokee SRT8; 2006-2008 Dodge Magnum)

Manufacturer

Picture for manufacturer Manley

Part Number

11670-8
4 reviews
Sale Price

$198.46

Estimated ship date Friday, November 27

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Manley 11670-8 is a high-performance stainless steel engine valve engineered for demanding street and race applications. Featuring a 2.100" head diameter and Pro-Flo 12 x 3/8" underhead design, this valve delivers superior airflow and durability backed by Manley's decades of precision manufacturing expertise.

Key Specifications:

  • Head Diameter: 2.100"
  • Stem Diameter: 0.3125"
  • Overall Length: 4.990"
  • Tip Length: 0.120"
  • Underhead Angle/Radius: Pro-Flo 12 x 3/8"
  • Margin: 0.050"
  • Seat Width: 0.085"
  • Top of Head: 7 Dish
  • Installed Height: Stock

Key Features:

  • Manufactured from premium Race Series stainless steel alloy for exceptional strength and longevity
  • Pro-Flo underhead design reduces stem diameter in the fillet area, improving airflow while reducing overall valve weight
  • Chrome-plated stems for outstanding wear resistance and reduced friction
  • Swirl-polished underheads to promote laminar airflow into the combustion chamber
  • Fully hardened tips for long-term durability under high-cycle operation
  • Precision-machined combustion faces with closely controlled margin heights
  • Exact stem-to-seat concentricity for an optimal sealing surface

Manley Performance has been the industry standard in high-performance stainless steel engine valves for over 40 years. The Manley 11670-8 is suitable for a wide range of applications — from mild street performance builds to high-horsepower race engines exceeding 1,000 hp. Whether you're building a street cruiser or a dedicated drag race engine, Manley delivers the precision and reliability required to perform at the highest level.

Products specifications

Fits

2006-2008 Jeep Grand Cherokee SRT8; 2006-2008 Dodge Magnum

Approximate Weight (g)

111

Lock Groove Quantity

3-groove

Lock Groove Style

Conventional

Overall Valve Length (in)

4.994 in.

Overall Valve Length (mm)

126.848mm

Quantity

Sold as a set of 8.

Swirl-Polished

Yes

Undercut Stem

No

Valve Head Diameter (in)

2.100 in.

Valve Head Diameter (mm)

53.340mm

Valve Head Style

7 degree dish

Valve Material

NK-842 stainless steel

Valve Seat Width (in)

0.085 in.

Valve Stem Diameter (in)

0.312 in.

Valve Stem Diameter (mm)

7.925mm

Valve Tip Length (in)

0.120 in.

Valve Tip Length (mm)

3.048mm

Lightning fast service! Good prices.

Finally I found the part I have searched all over for. Thank you autoplicity for having such a specialized part. Great customer service too. Very easy to use web site as well.

I'll start off saying that Autoplicity's prices are unbeatable...but, I placed my order on a Saturday night (which I know is the weekend)on a in stock part and it took them till the following Thursday to ship it out. I use my truck to make a living and was hoping to get it a little quicker, but now I'm down another 3-4 days till the part gets here. Also, I sent a e-mail on Tuesday evening regaurding my order and never got a response.

Autoplicity, was very easy to use, very fast, and an enjoyable experience. I would recommend to my closest friends!!

Share icon
Return Policy
Returns are easy at THMotorsports

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy