This stainless steel exhaust clamp from Nickson is designed to fit a 4-inch muffler. It provides a tight and secure seal for your exhaust system, ensuring that you won't have any leaks or other problems. Made from high-quality materials, this clamp is built to last and is resistant to rust and corrosion. Whether you're replacing a worn-out clamp or installing a new muffler, this Nickson exhaust clamp is the perfect choice.