What does the .020 measurement mean for these base gaskets?

The .020 inch measurement refers to the thickness of the gasket. This is often used when an engine's cylinders have been bored out to a larger size, and this specific thickness helps ensure a proper seal with the new bore dimensions.

Are these gaskets suitable for all Evo Big Twin engines?

These gaskets are designed for most Harley-Davidson Evo Big Twin models from 1984 through 1999. However, they specifically exclude the 1999 FLH and FLT models, so it's important to verify your specific model and year.

What is the advantage of rubber-covered steel gaskets?

The rubber covering on these steel gaskets helps to create a more effective seal, especially on surfaces that might not be perfectly flat. The steel core provides strength and stability, while the rubber helps conform to irregularities and resist leaks.

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Twin Power Base Gasket 3 5/8 Inch Bore .020 Rubber Covered Steel Replaces 84-99 Evo BT Pair

Specifications

Brand: TwinPower
Part #: 043186
UPC: 887337317625

Twin Power Base Gasket 3 5/8 Inch Bore .020 Rubber Covered Steel Replaces 84-99 Evo BT Pair

Name: Twin Power Base Gasket 3 5/8 Inch Bore .020 Rubber Covered Steel Replaces 84-99 Evo BT Pair
Brand: TwinPower
Price: 37.88 USD
Availability: InStock

$37.88

On Backorder

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

Twin Power base gaskets seal your engine. This rubber-covered steel pair fits many 84-99 Evo Big Twin models.

Key Features

This product includes a pair of base gaskets.
Gaskets feature a rubber-covered steel construction.
Designed for a 3 5/8 inch bore size.
Gaskets are .020 inch thick.
Made in the USA.

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Will this fit your vehicle?

Product Details

You get a pair of Twin Power base gaskets in this package, designed to create a solid seal between your engine cylinders and the crankcase. These gaskets are built with a rubber-covered steel construction, which helps ensure they hold up well over time and maintain a tight seal. They are specifically made for a 3 5/8 inch bore and come in a .020 inch thickness, which is helpful if you're working with an engine that's been previously bored out.

These gaskets are intended to replace the stock ones on a wide range of Harley-Davidson Evo Big Twin models from 1984 through 1999, excluding the 1999 FLH and FLT models. The rubber-covered steel design is a practical choice for this application, offering a good balance of sealing ability and durability. They are made in the USA, which is a notable detail for many builders.