Cometic GM LS1 SB 4.000 inch Bore .045 inch MLS Head Gasket - C5477-045

The Cometic GM LS1 SB 4.000 inch Bore .045 inch MLS Head Gasket - C5477-045 is a precision-engineered head gasket with a 4.000" bore and .000" compressed thickness.

The Cometic Multi-Layer Steel (MLS) head gasket is engineered for high-performance and racing applications where OEM gaskets fall short. Featuring Multi-Layer Steel (MLS) construction, this gasket uses multiple embossed steel layers that conform to surface irregularities and maintain a positive seal. Precision CNC-machined to exacting tolerances, this gasket seals combustion, water jackets, and oil passages simultaneously — eliminating the need for multiple gaskets or sealing compounds.

• Material: Multi-Layer Steel (MLS)
• Bore Size: 4.000"
• Thickness: .000" compressed
• Part Number: C5477-045

Verified fitment: Buick LaCrosse (2008–2009); Buick Rainier (2004–2007); Cadillac CTS (2004–2007); Cadillac Escalade (2002–2005); Chevrolet Avalanche (2007–2013); Chevrolet Avalanche 1500 (2002–2006); Chevrolet Camaro (1998–2002); Chevrolet Caprice (2011–2017); and 34 more.