Vband Clamp Set 3.5" - Quick ReleaseStainless Steel Quick Release V Band Clamp Kit 3. 5" 88. 9mm Building a high horsepower setup or running a large turbo? This 3. 5" (88. 9mm) V Band Clamp Kit is ideal for handling bigger exhaust flows while keeping things secure and serviceable. Designed for turbos or exhaust systems with a round pipe outlet, one flange welds onto the back of your turbo and the other onto your exhaust. The included quick release stainless clamp locks them together