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The Cometic AMC 390/401 Gen-3 V8 .045in MLS Cyl Head Gasket-4.380in Bore-With Indy Heads-18 Bolt Head - C5409-045 is a precision-engineered head gasket with a 4.380" bore and .045" 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.
Verified fitment: American Motors Ambassador (1971–1974); American Motors Javelin (1971–1974); American Motors Matador (1971–1976); Jeep Cherokee (1974–1978); Jeep J10 (1974–1978); Jeep J20 (1974–1978); Jeep Wagoneer (1974–1978).
Free Canadian shipping on qualifying orders $399+, with no duties or brokerage. Special order and made-to-order items can't be cancelled or refunded once ordered. Oversized items may carry a handling fee depending on your location; pickup in Mississauga has no fee.
We carry 750,000+ parts, so we can probably still get it. Check the spelling, try the part number, or ask us.
Request this part Text us (833) 691-5717