Cometic C9970-030 EST Top End Gasket Kit .030" Head Gaskets Harley Sportster 1200

The Cometic C9970-030 EST (Extreme Sealing Technology) Top End Gasket Kit is a complete gasket solution engineered for Harley-Davidson Sportster 1200 Evolution engines with 3.500" bore. This variant features .030" thickness Multi-Layer Steel (MLS) head gaskets for high-compression applications, compared to the standard .040" gaskets.

EST Technology Features:

• Embossed stainless steel head, base, and rocker gaskets with proprietary rubber coating
• .030" MLS cylinder head gaskets for increased compression and performance
• Advanced heat dissipation design draws heat away from combustion ring to eliminate hot spots
• Multi-layer construction with viton-coated outer layers for superior sealing
• Reinforced gasket materials including armor-clad, graphite, and galvanized steel

Complete Kit Includes: All necessary gaskets, seals, and O-rings required to rebuild the top end from cylinder base upward. The MLS head gaskets feature a stainless steel center layer sandwiched between embossed spring steel outer layers, providing exceptional resistance to shearing forces and extreme temperatures.

Important Note: Piston-to-head clearance should be verified (.030"-.032" optimum) before installation when using .030" thickness head gaskets. Made in the USA.