4-1 Exhaust Header

It features mandrel bends and TIG welded CNC machine flanges for a precise fit and optimal exhaust flow. This header is designed with a 1.50-inch inlet and a 2.25-inch outlet, aiming to increase airflow and deliver an immediate gain of 10-15 horsepower and torque. This exhaust header is compatible with 2001-2005 Honda Civic EX models equipped with the D17A2 1.7L 4-cylinder engine only. Installation hardware and exhaust gaskets are typically included. IMPORTANT EMISSION NOTICE: This product is intended for closed-course race or competition use ONLY on 1975 model year or newer vehicles and is NOT legal for street use on public roadways. Its manufacture, sale, offer for sale, or installation may be illegal nationwide under the Federal Clean Air Act and in states that have adopted California's emissions regulations. Buyers are responsible for confirming local laws and regulations prior to purchase. This product may also contain chemicals known to the State of California to cause cancer or reproductive harm.