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Standard Engine Seat Ring General Motors GM 12350996 Engine Valve Seat

American Car Valve Accessories
November 27, 2025
Category Connection: American Car Valve Accessories
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Tags:
#head valve guide #Engine Valve Seat #auto valve guide
Brief: Our team walks you through how the Standard Engine Seat Ring (GM 12350996) performs in common engine repair scenarios. You'll see a detailed explanation of its OEM-identical specifications, advanced high-chromium alloy construction, and professional installation requirements for GM LS-series and EcoTec3 engines.
Related Product Features:
  • Manufactured to GM's original blueprint dimensions (part #12350996) for guaranteed compatibility.
  • Made from special high-chromium alloy steel that resists extreme heat up to 1,200°F (650°C).
  • Heat-treated surface (38-42 HRC) prevents premature valve recession and maintains dimensional stability.
  • CNC-machined to tolerances within ±0.0005" for precise valve positioning and alignment.
  • Maintains proper compression ratios and creates perfect valve-to-seat seal for efficient combustion.
  • Withstands continuous operating temperatures and resists micro-welding from valves.
  • Works perfectly with both gasoline and ethanol blend fuels in GM truck and SUV V6/V8 applications.
  • Requires professional installation with proper counterbore preparation and interference fit.
FAQs:
  • What is the material composition of this GM 12350996 valve seat?
    This valve seat is made from a special high-chromium alloy steel formulation that resists extreme heat and features a heat-treated surface (38-42 HRC) to prevent premature valve recession and maintain dimensional stability.
  • Which GM engines is this valve seat compatible with?
    This OEM-spec valve seat is compatible with GM LS-series and EcoTec3 engines, as well as GM truck and SUV V6/V8 applications. It's designed for both gasoline and flex-fuel applications in these engine families.
  • What professional installation requirements should I be aware of?
    Professional installation requires proper counterbore preparation with correct angles, precise interference fit (0.003-0.005"), professional-grade seat installation tools, and it's recommended to replace guides when installing new seats with a proper break-in procedure for maximum longevity.
  • What performance benefits does this valve seat provide?
    This valve seat maintains proper compression ratios for maximum power output, creates perfect valve-to-seat seal for efficient combustion, reduces valve train wear by providing stable valve guidance, and improves fuel efficiency through consistent sealing performance.
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