No need to re-torque, the embossing design of the MLS gasket promotes an even clamp load across the sealing surface allowing for measurable reduced bore distortion. The outer layers of the gaskets are embossed and coated on both sides with Viton - a flouroelastomer rubber based material that is heat resistant to 250°C /482ºF. Viton is designed to meet the demands of a variety of harsh sealing environments, load conditions, and surface finishes. The center or shim layer is uncoated stainless steel layer Total Thickness.This is an indefinitely reusable gasket that has been tested on all the top racers engines in the country and has a 0 fail under heavy boost and up to 16 to 1 compression! This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts & Accessories\Engines & Engine Parts\Gaskets, Seals & Hardware\Gaskets & Seals".hotrod6" and is located in this country: US. This item can be shipped worldwide.