Product details:

Head Gaskets 383, 400, 413, 426W, and 440. Fits Bore Size: up to 4.380 inch. Thickness: 0.040 inch-.042 inch. Gasket Material: Composite Thick composite material gaskets (0.040 inch to 0.042 inch, unless otherwise noted) can be for replacement or competition applications up to 12.5:1 compression ratio. Sold as an engine set.