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Manley 11547-8 Severe Duty Exhaust Valves XH-428 Stainless Steel

(2008-2012 Honda Accord 4DR)

Manufacturer

Picture for manufacturer Manley

Part Number

11547-8
4 reviews
Sale Price

$301.07

Estimated ship date Friday, November 20

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Product Details

Constructed from Manley's proprietary XH-428 stainless steel — a material that delivers nearly double the ultimate tensile strength at 1,500°F compared to standard EV-8 valve material — these valves are built to withstand the extreme heat and stress cycles of performance engines.

Each valve features a chrome-plated stem and a hardened valve tip for long-term durability and wear resistance. The valves are fully machined and swirl polished to exacting tolerances, and feature a straight stem design for maximum strength.

Specifications:

  • Valve Type: Exhaust
  • Material: XH-428 Stainless Steel
  • Head Diameter: 1.710 in.
  • Stem Diameter: 0.342 in. (11/32 in.)
  • Overall Length: 4.668 in.
  • Installed Height: Stock
  • Tip Length: 0.260 in.
  • Underhead Angle/Radius: 10° x 3/8 in.
  • Margin: 0.060 in.
  • Seat Width: 0.100 in.
  • Top of Head: 7° Dish
  • Weight: 97 grams per valve
  • Stem Style: Straight

These Severe Duty exhaust valves are swirl polished and fully machined for consistent performance. The XH-428 alloy provides superior fatigue resistance, making this set an excellent upgrade over OEM valves in demanding high-performance and racing builds.

Products specifications

Fits

2008-2012 Honda Accord 4DR

Approximate Weight (g)

97

Lock Groove Quantity

1-groove

Lock Groove Style

Conventional

Overall Valve Length (in)

4.668 in.

Overall Valve Length (mm)

118.567mm

Quantity

Sold as a set of 8.

Swirl Polished

Yes

Undercut Stem

No

Valve Head Diameter (in)

1.710 in.

Valve Head Diameter (mm)

43.434mm

Valve Head Style

7 degree dish

Valve Material

XH-428 stainless steel

Valve Seat Width (in)

0.100 in.

Valve Stem Diameter (in)

0.342 in.

Valve Stem Diameter (mm)

8.687mm

Valve Tip Length (in)

0.260 in.

Valve Tip Length (mm)

6.350mm

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They had the best price on a hitch I was looking for and the shipping was fast also. The hitch was shipped bare except for taping the box of bolts to it thus leaving the hitch open and chipping the paint/powdercoating in quite a few places which I had to touch up before installing.

Easy to use website. The belts I ordered didn't have a picture but I knwew what I was looking for.

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