Performance Headers by Brospeed are designed to optimize engine exhaust flow and increase engine ooutput levels from 8-12%. The Headers are made from the highest quality 14-gauge mild-steel using mandrel bends t maintain a uniform tube diameter throughout. The high-quality MIG welding of all joints ensured durable protection against vibration fatigue and the flanges are jig-drilled and ground to ensure a gas-tight seal. These headers are ceramic coated for great looks and years of durability.