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Manley 11397-8 Severe Duty Exhaust Valves 1.625" Head SBC

Manufacturer

Picture for manufacturer Manley

Part Number

11397-8
6 reviews
Sale Price

$301.07

1 left at this price

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Usually delivered within 2 days

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Product Details

Featuring a 1.625" head diameter and a .311" stem diameter, these valves are designed to be installed at .600" longer than stock height, making them ideal for custom-built high-performance and racing engine builds requiring extended installed height.

Key Features:

  • XH-428 Exhaust Material — Proprietary alloy offering significantly higher ultimate tensile strength at elevated temperatures compared to conventional EV-8 material
  • 1.625" Head Diameter with precision-machined combustion face
  • .311" Stem Diameter with chrome stems for enhanced wear resistance
  • .600" Longer than Stock installed height for custom valvetrain geometry
  • Hardened Valve Tips for long-term durability under high-load operation
  • Swirl Polished Under-Head Area and fully machined combustion face to optimize airflow and combustion efficiency
  • Bead Loc Keeper Grooves — Bead Loc valve locks are required for installation

Manley's Severe Duty series is a proven choice for high-performance street and race engines operating in demanding conditions. The XH-428 material delivers superior fatigue life and high-temperature strength, making this valve set a reliable upgrade over stock or economy-grade exhaust valves.

I sent my order for some comp cams lifters on Monday 1-16-2012 at around 8:30 and the Item was still shipped on the next day Tuesday. This was awesome. I received my product on 1-19-2012. They have had the fastest turn around time that I have ever delt with. I would highly recommend them for your auto parts needs. They also had the cheapest price I could fine, including the shipping fee.<br>I like the fact that they sent me an e-mail that my item had shipped and gave the shipping number for tracking.

great service. Been looking for this trounce product for over a year. best hand cleaner i have ever used. makes the orange stuf seem like using just water.

Shipped immediately, very pleased.

Quick shipping, nice easy to use web site, and the lowest price with shipping around.. will use again..

Best price on Toyo tires I could find anywhere! And the shipping was $0.10 on the dollar compared to all the other tire retailers I checked. Definitely will order again from Autoplicity.

Great so fa

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