Cometic EX657 Spiral Wound Exhaust Gasket – 3 Pack

The Cometic EX657 Spiral Wound Exhaust Gasket – 3 Pack does not have enough exact application evidence to assign safe vehicle YMM. Match manufacturer part number C8881, exact engine, bore, thickness, material, sealing surfaces, fasteners, and every product note before ordering.

Fitment

Specifications

What’s Included

One new Cometic gasket product in the exact configuration and quantity identified by manufacturer part number C8881. Fasteners, sealants, fluids, companion gaskets, tools, and related engine components are included only when expressly stated for this exact part number.

About Cometic Gasket

Cometic develops sealing products for automotive and powersports engine applications. Correct selection remains exact-engine, exact-dimension, exact-material, exact-interface, and exact-part-number specific.

Related Cometic Gasket Products

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• Cometic Dodge Cummins 5.9L 24V/24VCR .040in MLS (2) 3 Port Exhaust Gasket
• Cometic Exhaust Header Collector Gasket .040″ Aluminum-2.5″ Diameter Port-3.5″ Bolt Circle-Set

Browse the Cometic Gasket collection for related head, intake, exhaust, valve-cover, and engine gasket products.

Frequently Asked Questions

Why is fitment verification required for this Cometic gasket?
Vehicle YMM alone does not identify the required engine and sealing configuration. Confirm the exact engine, dimensions, gasket construction, surface requirements, and part number.

Can I choose gasket thickness by vehicle alone?
No. Confirm the exact engine build, bore, deck and head condition, installed clearances, compression target, and manufacturer instructions before selecting thickness.

Do the sealing surfaces need preparation?
Yes. Follow the current Cometic and engine-builder requirements for surface finish, flatness, cleanliness, fasteners, torque procedure, and any specified sealant.

Installation Instructions

Follow the current Cometic and engine-manufacturer instructions for this exact part number. Verify surface finish, flatness, cleanliness, orientation, fasteners, torque sequence, torque values, sealant requirements, clearances, and fluid procedures before assembly. Inspect and test the completed repair before full-load operation.