Or a 250 cubic-inch (4-liter) engine with 300 horsepower would best match with a 3-inch exhaust pipe. As the size of the engine and horsepower increase, equating an inch in diameter for every 100 ...

There are a number of formulas to help establish exhaust pipe size, but for an engine displacing 300 to 350 ci and producing 250 to 350 hp, 2-1/4 to 2-1/2-inch dual pipes work well.

Proper exhaust-pipe size is a function of both engine output and displacement. The higher the engine's output, the larger the pipes should be. Likewise, larger engine displacements call for bigger ...

Pipe size directly affects power output. Go large—like 3-inches in diameter—and you will gain horsepower but lose torque. Go conservative on the order of 2 1/4 to 2 1/2 inches and you gain torque.

So you've decided to take the leap and add a cat-back exhaust system to your car. Will it work without a tune? Here's what ...

Typically, you'll see a 20 percent reduction in the inside diameter of a crimped pipe compared to a mandrel-bent pipe. "If you're mandrel-bending a 2.25-inch exhaust, it will flow as well as 2.5 ...

Four exhaust pipes sticking out the rear of a car might seem purely cosmetic, and in many cases, they are. But in others, especially in high-performance vehicles with over 1000 horsepower , quad ...

Q: Tim, my husband and I really need your help. Our 10-year-old multispeed kitchen exhaust fan drips greasy water back down onto the stove. Three of the highest fan speeds no longer work. The ...

Or a 250 cubic-inch (4-liter) engine with 300 horsepower would best match with a 3-inch exhaust pipe. As the size of the engine and horsepower increase, equating an inch in diameter for every 100 ...