What does the .030 oversize mean for this head gasket?

The .030 inch oversize indicates that this gasket is slightly larger than the standard size. This is typically used when the engine cylinders have been bored out by .030 inches during a rebuild or modification to achieve a specific displacement or compression ratio.

What Harley-Davidson models does this gasket fit?

This gasket fits a broad range of Harley-Davidson Twin Cam models from 1999 to 2017. This includes popular bikes such as the Road King, Street Glide, Electra Glide, and various Softail models.

Is this gasket suitable for stock Twin Cam engines?

This gasket is specifically built for a 3.937 inch bore and features a .030 inch oversize. While it can be used in top-end rebuilds, it's most commonly used when the engine has been bored out to match this specific oversize measurement.

Cometic Gasket Head Gasket C10034 - 1999-2017 Harley-Davidso

Name: Cometic 99-17 Harley-Davidson Twin Cam 3.937 Top End .030 Head Gasket
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-99-17-harley-davidson-twin-cam-3-937-top-end-030-head-gas-t14-688616
Price: 156.41 USD
Availability: BackOrder

Cometic 99-17 Harley-Davidson Twin Cam 3.937 Top End .030 Head Gasket

$156.41

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Cometic 99-17 Harley-Davidson Twin Cam 3.937 Top End .030 Head Gasket

Key Features

Fits 1999-2017 Harley-Davidson Twin Cam engines.
Designed for a 3.937 inch bore size.
Features a .030 inch oversize for specific engine builds.
Built for top-end engine applications.

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Product Details

Cometic Gasket is well-known for making reliable engine sealing components. This head gasket is built for Harley-Davidson Twin Cam engines from 1999 through 2017, specifically designed for a 3.937-inch bore and featuring a .030 inch oversize to help achieve proper compression when rebuilding or modifying your top end.

This gasket is constructed to provide a solid seal for your engine's cylinders. It's a popular choice for Twin Cam owners looking to ensure their engine runs smoothly and efficiently after top-end work. The .030 oversize is a specific measurement that matters when you're working with engines that have been bored out or are being rebuilt to precise specifications.

When you're working on your Harley-Davidson Twin Cam, using the right gasket is crucial for engine performance and longevity. This Cometic gasket is designed to fit a wide range of Harley-Davidson models, including popular bikes like the Road King, Street Glide, and Fat Boy, ensuring a proper seal for your specific application.