What material are these head gaskets made from?

These head gaskets are made from graphite. Graphite is a common material for head gaskets because it can withstand the high temperatures and pressures found in an engine's combustion chamber.

What does the '4in Bore' specification mean?

The '4in Bore' refers to the diameter of the cylinder bore that the gasket is designed to seal. This gasket is specifically made for engines that have a 4-inch cylinder bore.

What is the thickness of these head gaskets?

Each head gasket in this pack measures 0.043 inches thick. This specific thickness is important for achieving the correct compression ratio and sealing surface when installed.

FEATURED BRAND = COVERKING CHECK OUT COVERKING NOW →

Questions? Call Us:631-982-0042

M-F 8AM-4PM ET

Trusted Since 1957

Est. 1957

Specifications

Brand: S&S Cycle
Part #: 930-0090
UPC: 930-0090

S&S Cycle 1999+ BT 4in Bore Head Gasket - 2 Pack

Name: S&S Cycle 1999+ BT 4in Bore Head Gasket - 2 Pack
Brand: S&S Cycle
SKU: s-s-cycle-s-s-cycle-1999-bt-4in-bore-head-gasket-2-pack-t14-661801
Price: 46.43 USD
Availability: BackOrder

$46.43

On Backorder — Expected to ship by May 7, 2026

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

S&S Cycle 4in Bore Head Gasket - 2 Pack. Graphite construction for reliable sealing.

Key Features

This is a 2-pack of head gaskets.
Each gasket measures 0.043 inches thick.
Designed for a 4-inch bore size.
Constructed from graphite material.
Intended for 1999 and newer Big Twin engines.

Secure CheckoutFast Shipping631-982-0042

About this part

Product Details

Coming in at 0.043 inches thick, these graphite head gaskets from S&S Cycle are built for a 4-inch bore on Big Twin engines from 1999 and newer. Graphite is a solid material choice for head gaskets because it can handle the heat and pressure found in these engines, helping to create a reliable seal between your cylinder head and the engine block. This pack comes with two gaskets, so you'll have a spare or enough for a twin-cylinder setup.

When you're rebuilding the top end of your Big Twin, getting a good seal on your head gaskets is critical for proper engine performance and to prevent leaks. S&S Cycle is a well-known name in the V-twin world, and these gaskets are made to fit their specifications for a straightforward installation when you're working on your engine.