When a car is being upgraded in terms of horsepower and fuel efficiency, exhaust upgrades tend to be near the top of many ...

There's been a lot written about optimizing header design, but most of us can't afford one-off, custom-built, ideal-for-the-combination headers. Realistically, we use what we can buy over the counter.

If the 2017 Chevrolet Camaro ZL1 and its 650 hp and 650 lb-ft of torque from the factory aren’t enough for you, take solace in knowing plenty of aftermarket companies will be glad to help you out. In ...

As some of you may be able to recall, we dipped into the low 12s with our Project LS1 Trans Am using SLP Performance Parts' Tuned Length Headers, Y-pipe and Loud Mouth II exhaust, and little more than ...

We test a variety of header sizes and types from Hooker on a 427ci big-block Chevy to show power trends and performance advantages. Tests include 1 ¾-inch long tube, 1 7/8-inch long tube, 2-inch long ...