We didn't get 10 miles down the highway with our new 496-inch big-block before the smile faded and turned to a frown. The rearview mirror told the story: We were trailing a noxious cloud of oil smoke ...

Intake enhancements are only as good as the exhaust allows them to be. All the air and fuel in the world on the intake side won't make more power if the exhaust system can't pump out the by-products ...