With that in mind, we set out to improve the exhaust side of this '68 Chevy Nova. While the car isn ... and even broke the flange on the driver-side header right between the numbers one and ...

When building an exhaust system there are some rough guidelines for pipe diameter. In most cases a 2-inch dual system is good for up to 275 hp, a twin 2 1/4-inch system will handle up to 375 hp ...