"Torca" Style exhaust clamps are 100% 409 stainless steel and preformed to fit over 3 inch pipes forming a butt joint, making them a simple, effective way to connect exhaust system components such as pipes, mufflers and catalytic converters. These style clamps replace U-bolts and clamps. This style of fastening system includes force bars, bolts, nuts, and reaction block, which creates the power to stretch the clamp band tightly around the pipes forming a strong butt joint. The reaction block provides a full 360 degree equal distribution of stretching force, prohibiting pipe distortion while completing a seal around the joined exhaust components.