Cometic Buick 3800 Series II/III V6 .040in MLS Cylinder Head Gasket - 3.840in Bore - RHS - C5721-040

The Cometic Buick 3800 Series II/III V6 .040in MLS Cylinder Head Gasket - 3.840in Bore - RHS - C5721-040 is a precision-engineered head gasket with a 3.840" bore and .040" compressed thickness for the Right-Hand Side (RHS).

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: 3.840"
• Thickness: .040" compressed
• Position: Right-Hand Side (RHS)
• Part Number: C5721-040

Verified fitment: Buick LeSabre (1996–2003); Buick Park Avenue (1996–2003); Buick Regal (1996–2003); Buick Riviera (1996–1999); Chevrolet Camaro (1996–2002); Chevrolet Impala (2000–2003); Chevrolet Lumina (1998–1999); Chevrolet Monte Carlo (1998–2003); and 8 more.