SKUNK2 MegaPower Header: Designed and engineered to maximize exhaust flow and increase both horsepower and torque throughout the entire RPM powerband. This unique design is the result of over a decade of racing experience coupled with computerized modeling and extensive dyno testing. Each Skunk2 MegaPower Header features equal length, sequentially-paired, stepped primaries and a 4-2-1 Tri-Y design with a 2.5 inch collector. These features provide an extremely broad powerband that can be used on a wide range of engine sizes and configurations. Each header is constructed from T-304 stainless steel with fully polished, mandrel-bent tubing and a CNC-machined flange for added strength and durability.