High Chrome Alloy Steel, 1.6875" x 1.375" x .312"

Hard Valve Seats, set of 3

Application: Universal, Allis Chambers 344 & 516 Exhaust

     Quantity

• THREE seats included for the listed price. (last seats)
  

Alex's Parts carries a decent valve seat selection. If you're looking for a size we do not carry, please use the contact us link to make an inquiry. We might be able to supply them.

We carry seats from: Manley, Martin Wells & Precision Engine Parts.

These seats are from Manley. Part Number: VS1687-8

High Chrome Alloyed Seats are an excellent material for many cylinder heads.

Chrome alloy seats are easily machined on modern seat and guide machines or ground using stones. (Sioux, Kwik way, etc)

Some seats are available with a tapered ID. Shops who use stones to grind seats, like tapered ID seats because it reduces machining time.

Most of our valve seats are available in increments of 1/16". Starting at around 1" and going to around 2-1/16" We can get larger seats but don't stock allot of them.

The listed outside diameter of the seat is typically the decimal equivalent of the fractional size of the cutter.

The seat itself normally has the proper press added to it's outside diameter. This is referred to as "Plus Press"

     Sizes:

• Outside Diameter: 1.687" Plus Press
  
• Inside Diameter: 1.375"
• Depth" .312"
• Radius or chamfered leading edge for ease of installation

     Material:

• High Chrome Alloy Steel
  
• Hardness- RC40 combined with easy machinability
• Features excellent resistance to high temperatures in application to 1150 degree F
• Can be Machined w/ carbide or ground w/ stones
  

If you're looking for a special size seat, use the contact us link to send us a message.

Tech Notes-

• Intake seats do not need to be changed to run unleaded fuel, only exhaust
• Iron heads which came from the factory with seats usually require special size replacement seats.
• Aluminum heads also use special size seats. Their depth is usually much deeper then unleaded retro fit seats. 
  
• Aluminum heads commonly use depths between .312"-.437"
• Propane applications require Hi Nickel / Tunston Alloy seat. If you're looking for specially hard seats inquire via message.