Cometic H1340SPP063C MLS Pro Plus Cylinder Head Gasket .063" Bore

The Cometic H1340SPP063C is a Multi-Layer Steel (MLS) Stainless Pro Plus cylinder head gasket engineered for high-performance and racing engine builds. Cometic's SPP (Stainless Pro Plus) construction features multiple layers of embossed stainless steel that conform to the head and block surface, providing a superior, leak-free seal even under extreme heat and cylinder pressure cycles.

At 0.063 inches thick, this gasket allows precise compression ratio tuning while delivering the sealing performance demanded by built motors running elevated boost, nitrous, or high-compression naturally aspirated combinations. The MLS design eliminates the need for messy gasket sealants and is reusable during test assembly, making it a favorite for engine builders and professional race shops.

Key Features:

• Multi-Layer Steel (MLS) construction — multiple embossed stainless steel layers for superior sealing
• 0.063" compressed thickness — allows precise compression ratio adjustment
• Withstands extreme cylinder pressures and thermal cycling
• No gasket sealant required — installs dry
• Precision-cut fire ring and water/oil passages for exact OEM fitment
• Reusable during mock-up and test assembly
• Compatible with stock and aftermarket cylinder heads and blocks

Cometic Gasket is an ISO 9001-certified manufacturer trusted by professional engine builders across motorsports, powersports, and performance automotive applications. The H1340SPP063C is sold individually and is designed as a direct replacement or upgrade over composite OEM-style head gaskets.