Twin Scroll Equal Length exhaust header for SUBARU EJ20 GDB2.0NZKW stainless steel EL header kit for your Subaru STI. This header fits 2. 0 engines. (GDB GRB GVB VAB)This header is made from 304 stainless steel and includes half inch (12mm) thick flanges. The headers have a special designed collector to give perfect flow into the u pipe providing faster turbo spool and increased horsepower. The header is sold with the NZKW stainless steel u pipe. Installing the header will not only gain you about 15 wheel