Brand new D-series header is made of high quality T304 stainless steel and fully TIG weld. We offer one year warranty! Private Label MFG Power Driven D-Series header features a true 4-1 merge collector for more equal exhaust flow. This header delivers the best peak horsepower gains while utilizing a one piece design. This is ideal for all forms of competition; Autocross, Drag racing and road racing. It is recommended for 1.6L-1.8L engine displacements. For the EF CIVIC Chassis, some modification to the header will be needed to fit the car and motor. In EF/EE chassis, slight clearance may be required in front x-member. This units can NOT keep AC and power steering. It is one piece design.
Flange is .38" which is just about 3/8" thick.
Machined CNC-ed manifold flange.
18G on the 304 S/S. Measured at .049" to .050"
It is good for huge horsepower increase along with improved more air flow, gain 10-15HP.
Instruction is NOT included. Professional installation is highly recommended!
Item exactly the same as picture shown.