Cometic 91-03 Jeep 4.0L Inline-6 4.000in Bore .040in MLS Head Gasket - C5988-040

The Cometic 91-03 Jeep 4.0L Inline-6 4.000in Bore .040in MLS Head Gasket - C5988-040 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: C5988-040

Verified fitment: Jeep Cherokee (1987–2001); Jeep Comanche (1987–1992); Jeep Grand Cherokee (1993–2004); Jeep Wagoneer (1987–1990); Jeep Wrangler (1991–1995, 1997–2006).