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Manley 11247-8 Race Series Gen II Stainless Steel Exhaust Valves Set of 8

(2009-2014 Ford F150)

Manufacturer

Picture for manufacturer Manley

Part Number

11247-8
5 reviews
Sale Price

$370.89

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No Hassle Returns

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Fitment guaranteed

Fitment guaranteed

Product Details

The Manley 11247-8 Race Series Gen II custom exhaust valves are engineered for high-performance, boosted, and high-heat engine applications. Built for racers and serious engine builders who demand precision and reliability under extreme conditions.

Key Features:

  • Manufactured from premium XH-426 stainless steel material for superior heat resistance
  • 37mm (1.457 inch) valve head diameter with 9 degree dish head style
  • 0.274 inch (6.96mm) stem diameter for precise fitment
  • 4.800 inch overall valve length
  • Swirl-polished finish for smooth operation and improved flow characteristics
  • Hard tips and hardened keeper grooves for extended durability
  • 0.100 inch valve seat width for optimal sealing
  • Custom tailored to exact specifications including length, groove position, head diameter, and margin

Manley Performance has been building championship-winning engine components since 1966, combining decades of racing experience with precision manufacturing. Each valve in this set of 8 is designed to deliver consistent performance in demanding racing and high-performance street applications.

Products specifications

Fits

2009-2014 Ford F150

Overall Valve Length (in)

4.800 in.

Overall Valve Length (mm)

121.9mm

Quantity

Sold as a set of 8.

Swirl Polished

Yes

Undercut Stem

No

Valve Head Diameter (in)

1.457 in.

Valve Head Diameter (mm)

37.0mm

Valve Head Style

9 degree dish

Valve Material

XH-426 stainless steel

Valve Seat Width (in)

0.100 in.

Valve Stem Diameter (in)

0.274 in.

Valve Stem Diameter (mm)

7.0mm

Engine Type

ICE

Product Type

Engine Exhaust Valve

Valve Type

Exhaust

Valve Quantity

8

Maximum Head Diameter

37.0mm / 1.457

Stem Diameter

6.96mm / .2740 in.

Valve Stem Diameter

6.96mm / .2740 in.

Maximum Valve Length

121.9mm / 4.800

I was very skeptical of ordering from Autoplicity, as I've never heard of them. They had everything I needed in stock and shipped very quickly, and for a much better price than my normal suppliers at Jegs and Summit Racing. I would recommend them to everyone...............Jeff

Fast shipping, product was excellent .

Excellent prices + great customer service = people I want to do business with... period.

Very friendly customer service! They also shipped my radiator out very quickly. I will definetly be ordering from autoplicity again!

I needed a few small XRP fittings for our NHRA Top Alcohol Dragster, I had called XRP and even a "pro racer discount" the price was ridiculous; couple this with their ridiculous shipping/handling charge I had to go elsewhere. I typed in the XRP part number into Google and found Autoplicity, twice as many pcs. as I was planning on ordering and with shipping it was cheaper than one fitting from XRP direct. I will be checking Autoplicity anytime I'm ordering something from this day on, everything about the transaction was smooth and simple. I just got my tracking number today and the stuff is on its' way. Thanks for making this transaction so easy and not robbing your customers on something as frivolous as "handling".<br><br>Respectfully,<br>Brandon Booher<br>NHRA TAD #34

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