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 ...

Proper exhaust-pipe size is a function of both engine output ... generally helps both power and gas mileage, going too large can over-scavenge an engine and actually decrease engine output as ...

Remember one simple rule when you're shopping for an exhaust system. Pipe size directly affects power output. Go large—like 3-inches in diameter—and you will gain horsepower but lose torque.

Few elements have as large an impact on a motorcycle’s design ... is more efficiently used in another way: in a tuned exhaust pipe. Automotive engines ­increasingly recover exhaust energy ...

But when you uncork it, a large portion of the exhaust noise is funneled through a Y-pipe out to the atmosphere, bypassing the mufflers completely. See All 11 Photos The old-school exhaust cutouts ...

These exhaust pipes are also quite large in diameter to maximize flow and reduce engine backpressure. Additionally, the Corvette Z06’s center-exit exhaust system features continually variable ...

The solution is to split the single exhaust into three pipes just behind the rear axle. The two outer pipes include large straight-flow mufflers. The center, smaller diameter pipe is a resonator ...