See All 19 Photos Because of catalytic converter sizing and the general fit, the X-shape crossover section is 2.5 inches in diameter, while the exhaust pipes step up to a 3-inch tubing.

Not sure what size exhaust your vehicle needs? Learn how to choose the right diameter and what can go wrong if it’s too big ...

You're sitting around with your typical street/strip V-8 and wondering, should I get 2.5-inch-diameter exhaust pipes and mufflers, or should I go 3-inch? In this episode of Engine Masters ...

Since Lester makes a serious 560 hp, a 3 ... pipes. An exhaust system may not be very romantic, but when installed correctly, it will enhance not only the sound but the fun of driving. Our 3-inch ...