High flow, mandrel-bent tubes provide consistent tubing diameters for smooth flow and increased exhaust velocity Heavy duty tubing and high quality welds for increased strength and durability Smooth transition, 1-5/8†diameter primary tubes are used for increased exhaust flow increasing performance, improving throttle response and broadening the torque curve 2-1/2†collector used for high tuck design and maximum exhaust component clearance Machined 3/8†header flange for a leak-free seal and maximum strength Premium aluminum header gaskets and installation hardware included Coated in high heat resistant black paint for a stealthy look Shorty header design with rear exit location is perfect for lowered vehicles where maximum ground clearance and fitment is critical