Dynatech V-Clamp Collars are designed specifically for the builder that wants a leak free bolt up seal. They allow quick and easy removal or installation of exhaust components. The stainless steel clamps allow for a strong, reliable clamping device that keeps the seal tight. The mild steel rings make it easy for anyone to weld them to any exhaust component. They are the perfect addition to many turbo applications for a durable long lasting seal.