Cometic C9721 3.875-Inch Twin Cam MLS Cylinder Head Gasket Kit, .030-Inch

Triple-layer Steel head gasket for Twin Cam Motors

Bore Size: 3.875"

Material: MLS 3-layer

Thickness: .030"

OEM 1677599

Sold in sets of 2

Made in USA

The Cometic C9721 Twin Cam MLS cylinder head gasket kit is designed for high-performance engine applications requiring dependable sealing and consistent clamping. This kit uses Cometic’s multi-layer steel construction to help maintain a reliable seal between the cylinder head and engine block while accommodating the demands of performance-oriented builds. It is suited for applications using a 3.875-inch bore and provides a .030-inch compressed gasket thickness.
The Cometic C9721 is manufactured for precise fitment and repeatable installation, helping support proper combustion sealing and reduce the risk of leakage when used with compatible Twin Cam engine components. Its multi-layer steel design provides strength and durability under elevated cylinder pressures and operating temperatures, making it a practical choice for engine builders, performance technicians, and enthusiasts seeking a replacement or upgrade gasket.
This product is supplied as a kit and is intended for installation according to the engine manufacturer’s service procedures and the applicable Cometic recommendations. Verify bore size, gasket thickness, engine configuration, and cylinder head compatibility before installation. Proper surface preparation, fastener condition, and torque procedures are essential for achieving the best sealing performance from the Cometic C9721 gasket kit.

Features:

• Brand: Cometic

• Part Number: C9721

• Product Type: Twin Cam MLS cylinder head gasket kit

• Construction: Multi-layer steel for durable sealing performance

• Bore Size: 3.875 inches

• Compressed Thickness: .030 inch

• Application: Compatible Twin Cam performance engine configurations

• Unit of Measure: Kit