Product Features. SPECIFICATIONS: Our Exhaust Pipe Cutter is designed to cut 3/4-inch to 3 1/4-inch tailpipes and exhaust pipes and features a cutting wheel blade on each of its 15 rollers.

That's good news because it is easier to cut a hole for a smaller pipe. We decided on a piece of 1-1/2-inch exhaust tubing for the crossover pipe, which is roughly 70 percent of the main tubing size.

ASK THE BUILDER | It's fairly easy to cut a hole in your roof, but it's crucial to correctly install the pipe to prevent moisture from leaking into your home.